31013121120 has 48 divisors (see below), whose sum is σ = 97691333040. Its totient is φ = 8270165504.

The previous prime is 31013121103. The next prime is 31013121163. The reversal of 31013121120 is 2112131013.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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 31013121120.

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, 32304855 + ... + 32305814.

It is an arithmetic number, because the mean of its divisors is an integer number (2035236105).

Almost surely, 2^31013121120 is an apocalyptic number.

31013121120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31013121120 is an abundant number, since it is smaller than the sum of its proper divisors (66678211920).

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

31013121120 is a wasteful number, since it uses less digits than its factorization.

31013121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64610687 (or 64610679 counting only the distinct ones).

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

Adding to 31013121120 its reverse (2112131013), we get a palindrome (33125252133).

The spelling of 31013121120 in words is "thirty-one billion, thirteen million, one hundred twenty-one thousand, one hundred twenty".