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2002110021221 = 10331938151037
BaseRepresentation
bin11101001000100111000…
…011100111111001100101
321002101210111020000221012
4131020213003213321211
5230300310131134341
64131431234032005
7264435103250312
oct35104703477145
97071714200835
102002110021221
117020a9a03a82
12284032718605
13116a4b75063b
146cc8cbc7d09
153712d3740eb
hex1d2270e7e65

2002110021221 has 4 divisors (see below), whose sum is σ = 2004048173292. Its totient is φ = 2000171869152.

The previous prime is 2002110021187. The next prime is 2002110021251. The reversal of 2002110021221 is 1221200112002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1104380301025 + 897729720196 = 1050895^2 + 947486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002110021221 - 26 = 2002110021157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002110021196 and 2002110021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002110021251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969074486 + ... + 969076551.

It is an arithmetic number, because the mean of its divisors is an integer number (501012043323).

Almost surely, 22002110021221 is an apocalyptic number.

It is an amenable number.

2002110021221 is a deficient number, since it is larger than the sum of its proper divisors (1938152071).

2002110021221 is a wasteful number, since it uses less digits than its factorization.

2002110021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938152070.

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

Adding to 2002110021221 its reverse (1221200112002), we get a palindrome (3223310133223).

The spelling of 2002110021221 in words is "two trillion, two billion, one hundred ten million, twenty-one thousand, two hundred twenty-one".

Divisors: 1 1033 1938151037 2002110021221