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2121102001220 = 225234611091307
BaseRepresentation
bin11110110111011011100…
…010000000010001000100
321111202221020121220221112
4132313123202000101010
5234223004103014340
64302230521104152
7306146612350016
oct36673342002104
97452836556845
102121102001220
11748610867814
122a3100928058
13125032b50267
147493a2d61b6
153a294ab2065
hex1eddb880444

2121102001220 has 24 divisors (see below), whose sum is σ = 4647980038464. Its totient is φ = 811552069856.

The previous prime is 2121102001171. The next prime is 2121102001229. The reversal of 2121102001220 is 221002011212.

It is a junction number, because it is equal to n+sod(n) for n = 2121102001195 and 2121102001204.

It is not an unprimeable number, because it can be changed into a prime (2121102001229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2305545194 + ... + 2305546113.

It is an arithmetic number, because the mean of its divisors is an integer number (193665834936).

Almost surely, 22121102001220 is an apocalyptic number.

2121102001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121102001220 is an abundant number, since it is smaller than the sum of its proper divisors (2526878037244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121102001220 is a wasteful number, since it uses less digits than its factorization.

2121102001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611091339 (or 4611091337 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121102001220 its reverse (221002011212), we get a palindrome (2342104012432).

The spelling of 2121102001220 in words is "two trillion, one hundred twenty-one billion, one hundred two million, one thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 23 46 92 115 230 460 4611091307 9222182614 18444365228 23055456535 46110913070 92221826140 106055100061 212110200122 424220400244 530275500305 1060551000610 2121102001220