31220130131 has 16 divisors (see below), whose sum is σ = 33442787520. Its totient is φ = 29040675840.

The previous prime is 31220130121. The next prime is 31220130203. The reversal of 31220130131 is 13103102213.

It is a cyclic number.

It is not a de Polignac number, because 31220130131 - 2¹⁴ = 31220113747 is a prime.

It is a super-2 number, since 2×31220130131² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31220130121) 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, 6399065 + ... + 6403941.

It is an arithmetic number, because the mean of its divisors is an integer number (2090174220).

Almost surely, 2^31220130131 is an apocalyptic number.

31220130131 is a deficient number, since it is larger than the sum of its proper divisors (2222657389).

31220130131 is a wasteful number, since it uses less digits than its factorization.

31220130131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9214.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31220130131 its reverse (13103102213), we get a palindrome (44323232344).

The spelling of 31220130131 in words is "thirty-one billion, two hundred twenty million, one hundred thirty thousand, one hundred thirty-one".