231211021100 has 36 divisors (see below), whose sum is σ = 531241326504. Its totient is φ = 87044148480.

The previous prime is 231211021081. The next prime is 231211021133. The reversal of 231211021100 is 1120112132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68001542 + ... + 68004941.

It is an arithmetic number, because the mean of its divisors is an integer number (14756703514).

Almost surely, 2^231211021100 is an apocalyptic number.

231211021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231211021100 is an abundant number, since it is smaller than the sum of its proper divisors (300030305404).

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

231211021100 is a wasteful number, since it uses less digits than its factorization.

231211021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136006514 (or 136006507 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 231211021100 its reverse (1120112132), we get a palindrome (232331133232).

The spelling of 231211021100 in words is "two hundred thirty-one billion, two hundred eleven million, twenty-one thousand, one hundred".