31130103131231 has 16 divisors (see below), whose sum is σ = 34606420359168. Its totient is φ = 27808327058400.

The previous prime is 31130103131131. The next prime is 31130103131243. The reversal of 31130103131231 is 13213130103113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31130103131231 is a prime.

It is a super-2 number, since 2×31130103131231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31130103131197 and 31130103131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130103131131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98233046 + ... + 98549436.

It is an arithmetic number, because the mean of its divisors is an integer number (2162901272448).

Almost surely, 2^{31130103131231} is an apocalyptic number.

31130103131231 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31130103131231 is a deficient number, since it is larger than the sum of its proper divisors (3476317227937).

31130103131231 is a wasteful number, since it uses less digits than its factorization.

31130103131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560582.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31130103131231 its reverse (13213130103113), we get a palindrome (44343233234344).

The spelling of 31130103131231 in words is "thirty-one trillion, one hundred thirty billion, one hundred three million, one hundred thirty-one thousand, two hundred thirty-one".