1331020120 has 32 divisors (see below), whose sum is σ = 3125005920. Its totient is φ = 509259520.

The previous prime is 1331020109. The next prime is 1331020133. The reversal of 1331020120 is 210201331.

It is a super-2 number, since 2×1331020120² = 3543229119689628800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1331020120.

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, 722461 + ... + 724300.

It is an arithmetic number, because the mean of its divisors is an integer number (97656435).

Almost surely, 2^1331020120 is an apocalyptic number.

1331020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331020120 is an abundant number, since it is smaller than the sum of its proper divisors (1793985800).

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

1331020120 is a wasteful number, since it uses less digits than its factorization.

1331020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446795 (or 1446791 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1331020120 is about 36483.1484386970. The cubic root of 1331020120 is about 1100.0055426718.

Adding to 1331020120 its reverse (210201331), we get a palindrome (1541221451).

The spelling of 1331020120 in words is "one billion, three hundred thirty-one million, twenty thousand, one hundred twenty".