31012119973 has 2 divisors, whose sum is σ = 31012119974. Its totient is φ = 31012119972.

The previous prime is 31012119959. The next prime is 31012119991. The reversal of 31012119973 is 37991121013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17508053124 + 13504066849 = 132318^2 + 116207^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012119973 - 2²¹ = 31010022821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31012119473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506059986 + 15506059987.

It is an arithmetic number, because the mean of its divisors is an integer number (15506059987).

Almost surely, 2^31012119973 is an apocalyptic number.

It is an amenable number.

31012119973 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012119973 is an equidigital number, since it uses as much as digits as its factorization.

31012119973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 37.

The spelling of 31012119973 in words is "thirty-one billion, twelve million, one hundred nineteen thousand, nine hundred seventy-three".