231121212122200 has 48 divisors (see below), whose sum is σ = 537497012197080. Its totient is φ = 92424365448960.

The previous prime is 231121212122191. The next prime is 231121212122221. The reversal of 231121212122200 is 2221212121132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149977734 + ... + 151510933.

Almost surely, 2^{231121212122200} is an apocalyptic number.

231121212122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231121212122200 is an abundant number, since it is smaller than the sum of its proper divisors (306375800074880).

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

231121212122200 is a wasteful number, since it uses less digits than its factorization.

231121212122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301492516 (or 301492507 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 231121212122200 its reverse (2221212121132), we get a palindrome (233342424243332).

The spelling of 231121212122200 in words is "two hundred thirty-one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, two hundred".