31123130130 has 48 divisors (see below), whose sum is σ = 80966709720. Its totient is φ = 8294724864.

The previous prime is 31123130113. The next prime is 31123130147. The reversal of 31123130130 is 3103132113.

It is a happy number.

31123130130 is a `hidden beast` number, since 311 + 23 + 1 + 301 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (31123130113) and next prime (31123130147).

It can be written as a sum of positive squares in 4 ways, for example, as 10689285321 + 20433844809 = 103389^2 + 142947^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59136 + ... + 256404.

Almost surely, 2^31123130130 is an apocalyptic number.

31123130130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31123130130 is an abundant number, since it is smaller than the sum of its proper divisors (49843579590).

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

31123130130 is a wasteful number, since it uses less digits than its factorization.

31123130130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199035 (or 199032 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31123130130 its reverse (3103132113), we get a palindrome (34226262243).

The spelling of 31123130130 in words is "thirty-one billion, one hundred twenty-three million, one hundred thirty thousand, one hundred thirty".