203021110012122 has 12 divisors (see below), whose sum is σ = 439879071692970. Its totient is φ = 67673703337368.

The previous prime is 203021110012111. The next prime is 203021110012157. The reversal of 203021110012122 is 221210011120302.

It can be written as a sum of positive squares in only one way, i.e., 185736312077121 + 17284797935001 = 13628511^2 + 4157499^2 .

It is a super-2 number, since 2×203021110012122² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11278950556229 = 203021110012122 / (2 + 0 + 3 + 0 + 2 + 1 + 1 + 1 + 0 + 0 + 1 + 2 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 203021110012095 and 203021110012104.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5639475278097 + ... + 5639475278132.

Almost surely, 2^{203021110012122} is an apocalyptic number.

203021110012122 is an abundant number, since it is smaller than the sum of its proper divisors (236857961680848).

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

203021110012122 is a wasteful number, since it uses less digits than its factorization.

203021110012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11278950556237 (or 11278950556234 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 203021110012122 its reverse (221210011120302), we get a palindrome (424231121132424).

The spelling of 203021110012122 in words is "two hundred three trillion, twenty-one billion, one hundred ten million, twelve thousand, one hundred twenty-two".