31311021130130 has 64 divisors (see below), whose sum is σ = 64965348449280. Its totient is φ = 10643059198464.

The previous prime is 31311021130121. The next prime is 31311021130139. The reversal of 31311021130130 is 3103112011313.

It is an interprime number because it is at equal distance from previous prime (31311021130121) and next prime (31311021130139).

It is a super-2 number, since 2×31311021130130² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31311021130139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5301191 + ... + 9524949.

It is an arithmetic number, because the mean of its divisors is an integer number (1015083569520).

Almost surely, 2^{31311021130130} is an apocalyptic number.

31311021130130 is an abundant number, since it is smaller than the sum of its proper divisors (33654327319150).

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

31311021130130 is a wasteful number, since it uses less digits than its factorization.

31311021130130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224683.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 31311021130130 its reverse (3103112011313), we get a palindrome (34414133141443).

The spelling of 31311021130130 in words is "thirty-one trillion, three hundred eleven billion, twenty-one million, one hundred thirty thousand, one hundred thirty".