1031320120 has 32 divisors (see below), whose sum is σ = 2321492400. Its totient is φ = 412346368.

The previous prime is 1031320117. The next prime is 1031320139. The reversal of 1031320120 is 210231301.

It is a super-5 number, since 5×1031320120⁵ (a number of 46 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1031320120.

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, 121371 + ... + 129589.

Almost surely, 2^1031320120 is an apocalyptic number.

1031320120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031320120 is an abundant number, since it is smaller than the sum of its proper divisors (1290172280).

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

1031320120 is a wasteful number, since it uses less digits than its factorization.

1031320120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11367 (or 11363 counting only the distinct ones).

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

The square root of 1031320120 is about 32114.1731950240. The cubic root of 1031320120 is about 1010.3329033639.

Adding to 1031320120 its reverse (210231301), we get a palindrome (1241551421).

The spelling of 1031320120 in words is "one billion, thirty-one million, three hundred twenty thousand, one hundred twenty".