31253007912109 has 2 divisors, whose sum is σ = 31253007912110. Its totient is φ = 31253007912108.

The previous prime is 31253007912107. The next prime is 31253007912121. The reversal of 31253007912109 is 90121970035213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20274037128900 + 10978970783209 = 4502670^2 + 3313453^2 .

It is a cyclic number.

It is not a de Polignac number, because 31253007912109 - 2¹ = 31253007912107 is a prime.

Together with 31253007912107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31253007912107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15626503956054 + 15626503956055.

It is an arithmetic number, because the mean of its divisors is an integer number (15626503956055).

Almost surely, 2^{31253007912109} is an apocalyptic number.

It is an amenable number.

31253007912109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31253007912109 is an equidigital number, since it uses as much as digits as its factorization.

31253007912109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 43.

The spelling of 31253007912109 in words is "thirty-one trillion, two hundred fifty-three billion, seven million, nine hundred twelve thousand, one hundred nine".