20110002121 has 16 divisors (see below), whose sum is σ = 22758019200. Its totient is φ = 17602144000.

The previous prime is 20110002109. The next prime is 20110002149. The reversal of 20110002121 is 12120001102.

It is a cyclic number.

It is not a de Polignac number, because 20110002121 - 2⁵ = 20110002089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110002098 and 20110002107.

It is not an unprimeable number, because it can be changed into a prime (20110002221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26721 + ... + 202321.

It is an arithmetic number, because the mean of its divisors is an integer number (1422376200).

Almost surely, 2^20110002121 is an apocalyptic number.

It is an amenable number.

20110002121 is a deficient number, since it is larger than the sum of its proper divisors (2648017079).

20110002121 is a wasteful number, since it uses less digits than its factorization.

20110002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176000.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20110002121 its reverse (12120001102), we get a palindrome (32230003223).

The spelling of 20110002121 in words is "twenty billion, one hundred ten million, two thousand, one hundred twenty-one".