20331200121102 has 48 divisors (see below), whose sum is σ = 47608290829008. Its totient is φ = 6233491393920.

The previous prime is 20331200121079. The next prime is 20331200121109. The reversal of 20331200121102 is 20112100213302.

20331200121102 is a `hidden beast` number, since 2 + 0 + 331 + 200 + 121 + 10 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331200121109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154534728 + ... + 154666235.

It is an arithmetic number, because the mean of its divisors is an integer number (991839392271).

Almost surely, 2^{20331200121102} is an apocalyptic number.

20331200121102 is an abundant number, since it is smaller than the sum of its proper divisors (27277090707906).

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

20331200121102 is a wasteful number, since it uses less digits than its factorization.

20331200121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309201265 (or 309201262 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20331200121102 its reverse (20112100213302), we get a palindrome (40443300334404).

The spelling of 20331200121102 in words is "twenty trillion, three hundred thirty-one billion, two hundred million, one hundred twenty-one thousand, one hundred two".