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2121111212 = 221148207073
BaseRepresentation
bin111111001101101…
…1001011010101100
312110211020121120112
41332123121122230
513321001024322
6550250435152
7103364101463
oct17633313254
95424217515
102121111212
11999348280
124b2432ab8
1327a59ccbc
141619c39da
15c63375e2
hex7e6d96ac

2121111212 has 12 divisors (see below), whose sum is σ = 4049394216. Its totient is φ = 964141440.

The previous prime is 2121111193. The next prime is 2121111217.

2121111212 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21211112122 = 8998225547344217888, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2121111217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24103493 + ... + 24103580.

It is an arithmetic number, because the mean of its divisors is an integer number (337449518).

Almost surely, 22121111212 is an apocalyptic number.

2121111212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2121111212 is a deficient number, since it is larger than the sum of its proper divisors (1928283004).

2121111212 is a wasteful number, since it uses less digits than its factorization.

2121111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48207088 (or 48207086 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 2121111212 is about 46055.5231432670. The cubic root of 2121111212 is about 1284.8560678973.

It can be divided in two parts, 21211 and 11212, that added together give a palindrome (32423).

The spelling of 2121111212 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twelve".

Divisors: 1 2 4 11 22 44 48207073 96414146 192828292 530277803 1060555606 2121111212