31203101117 has 2 divisors, whose sum is σ = 31203101118. Its totient is φ = 31203101116.

The previous prime is 31203101099. The next prime is 31203101159. The reversal of 31203101117 is 71110130213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23857582681 + 7345518436 = 154459^2 + 85706^2 .

It is a cyclic number.

It is not a de Polignac number, because 31203101117 - 2¹² = 31203097021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31203101417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15601550558 + 15601550559.

It is an arithmetic number, because the mean of its divisors is an integer number (15601550559).

Almost surely, 2^31203101117 is an apocalyptic number.

It is an amenable number.

31203101117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31203101117 is an equidigital number, since it uses as much as digits as its factorization.

31203101117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The spelling of 31203101117 in words is "thirty-one billion, two hundred three million, one hundred one thousand, one hundred seventeen".