31020131113 has 2 divisors, whose sum is σ = 31020131114. Its totient is φ = 31020131112.

The previous prime is 31020131089. The next prime is 31020131147. The reversal of 31020131113 is 31113102013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20331052569 + 10689078544 = 142587^2 + 103388^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020131113 - 2¹⁷ = 31020000041 is a prime.

It is not a weakly prime, because it can be changed into another prime (31020131173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510065556 + 15510065557.

It is an arithmetic number, because the mean of its divisors is an integer number (15510065557).

Almost surely, 2^31020131113 is an apocalyptic number.

It is an amenable number.

31020131113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020131113 is an equidigital number, since it uses as much as digits as its factorization.

31020131113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31020131113 its reverse (31113102013), we get a palindrome (62133233126).

The spelling of 31020131113 in words is "thirty-one billion, twenty million, one hundred thirty-one thousand, one hundred thirteen".