31231011120 has 40 divisors (see below), whose sum is σ = 96816135216. Its totient is φ = 8328269568.

The previous prime is 31231011109. The next prime is 31231011131. The reversal of 31231011120 is 2111013213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31231011109) and next prime (31231011131).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 31231011120.

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, 65064367 + ... + 65064846.

Almost surely, 2^31231011120 is an apocalyptic number.

31231011120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31231011120 is an abundant number, since it is smaller than the sum of its proper divisors (65585124096).

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

31231011120 is a wasteful number, since it uses less digits than its factorization.

31231011120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130129229 (or 130129223 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31231011120 its reverse (2111013213), we get a palindrome (33342024333).

The spelling of 31231011120 in words is "thirty-one billion, two hundred thirty-one million, eleven thousand, one hundred twenty".