1031131212420 has 48 divisors (see below), whose sum is σ = 2913655187520. Its totient is φ = 272445676416.

The previous prime is 1031131212407. The next prime is 1031131212431. The reversal of 1031131212420 is 242121311301.

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, 78826122 + ... + 78839201.

It is an arithmetic number, because the mean of its divisors is an integer number (60701149740).

Almost surely, 2^{1031131212420} is an apocalyptic number.

1031131212420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031131212420 is an abundant number, since it is smaller than the sum of its proper divisors (1882523975100).

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

1031131212420 is a wasteful number, since it uses less digits than its factorization.

1031131212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157665444 (or 157665442 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1031131212420 its reverse (242121311301), we get a palindrome (1273252523721).

The spelling of 1031131212420 in words is "one trillion, thirty-one billion, one hundred thirty-one million, two hundred twelve thousand, four hundred twenty".