231012021000 has 64 divisors (see below), whose sum is σ = 720757514880. Its totient is φ = 61603204800.

The previous prime is 231012020977. The next prime is 231012021043. The reversal of 231012021000 is 120210132.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38499004 + ... + 38505003.

It is an arithmetic number, because the mean of its divisors is an integer number (11261836170).

Almost surely, 2^231012021000 is an apocalyptic number.

231012021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231012021000 is an abundant number, since it is smaller than the sum of its proper divisors (489745493880).

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

231012021000 is a wasteful number, since it uses less digits than its factorization.

231012021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77004031 (or 77004017 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 231012021000 its reverse (120210132), we get a palindrome (231132231132).

The spelling of 231012021000 in words is "two hundred thirty-one billion, twelve million, twenty-one thousand".