31012120037 has 2 divisors, whose sum is σ = 31012120038. Its totient is φ = 31012120036.

The previous prime is 31012120031. The next prime is 31012120057. The reversal of 31012120037 is 73002121013.

It is an a-pointer prime, because the next prime (31012120057) can be obtained adding 31012120037 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22620460801 + 8391659236 = 150401^2 + 91606^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012120037 - 2⁶ = 31012119973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31012120031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506060018 + 15506060019.

It is an arithmetic number, because the mean of its divisors is an integer number (15506060019).

Almost surely, 2^31012120037 is an apocalyptic number.

It is an amenable number.

31012120037 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012120037 is an equidigital number, since it uses as much as digits as its factorization.

31012120037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The spelling of 31012120037 in words is "thirty-one billion, twelve million, one hundred twenty thousand, thirty-seven".