231211313020 has 24 divisors (see below), whose sum is σ = 485614793664. Its totient is φ = 92470994496.

The previous prime is 231211312921. The next prime is 231211313077. The reversal of 231211313020 is 20313112132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704979 + ... + 979498.

It is an arithmetic number, because the mean of its divisors is an integer number (20233949736).

Almost surely, 2^231211313020 is an apocalyptic number.

231211313020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231211313020 is an abundant number, since it is smaller than the sum of its proper divisors (254403480644).

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

231211313020 is a wasteful number, since it uses less digits than its factorization.

231211313020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691349 (or 1691347 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231211313020 its reverse (20313112132), we get a palindrome (251524425152).

The spelling of 231211313020 in words is "two hundred thirty-one billion, two hundred eleven million, three hundred thirteen thousand, twenty".