31122011130 has 64 divisors (see below), whose sum is σ = 85582897920. Its totient is φ = 7095297024.

The previous prime is 31122011117. The next prime is 31122011131. The reversal of 31122011130 is 3111022113.

It is a happy number.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31122011131) 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, 108799 + ... + 272178.

It is an arithmetic number, because the mean of its divisors is an integer number (1337232780).

Almost surely, 2^31122011130 is an apocalyptic number.

31122011130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31122011130 is an abundant number, since it is smaller than the sum of its proper divisors (54460886790).

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

31122011130 is a wasteful number, since it uses less digits than its factorization.

31122011130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381383.

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

Adding to 31122011130 its reverse (3111022113), we get a palindrome (34233033243).

The spelling of 31122011130 in words is "thirty-one billion, one hundred twenty-two million, eleven thousand, one hundred thirty".