20000121102 has 32 divisors (see below), whose sum is σ = 47863539360. Its totient is φ = 6153883200.

The previous prime is 20000121091. The next prime is 20000121143. The reversal of 20000121102 is 20112100002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14244399 + ... + 14245802.

It is an arithmetic number, because the mean of its divisors is an integer number (1495735605).

Almost surely, 2^20000121102 is an apocalyptic number.

20000121102 is an abundant number, since it is smaller than the sum of its proper divisors (27863418258).

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

20000121102 is a wasteful number, since it uses less digits than its factorization.

20000121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28490225 (or 28490219 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20000121102 its reverse (20112100002), we get a palindrome (40112221104).

The spelling of 20000121102 in words is "twenty billion, one hundred twenty-one thousand, one hundred two".