1031123231220 has 48 divisors (see below), whose sum is σ = 2889577551168. Its totient is φ = 274734528000.

The previous prime is 1031123231219. The next prime is 1031123231249. The reversal of 1031123231220 is 221323211301.

It is a congruent number.

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, 7167781 + ... + 7310220.

It is an arithmetic number, because the mean of its divisors is an integer number (60199532316).

Almost surely, 2^{1031123231220} is an apocalyptic number.

1031123231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031123231220 is an abundant number, since it is smaller than the sum of its proper divisors (1858454319948).

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

1031123231220 is a wasteful number, since it uses less digits than its factorization.

1031123231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14479200 (or 14479198 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1031123231220 its reverse (221323211301), we get a palindrome (1252446442521).

The spelling of 1031123231220 in words is "one trillion, thirty-one billion, one hundred twenty-three million, two hundred thirty-one thousand, two hundred twenty".