31121112221159 has 2 divisors, whose sum is σ = 31121112221160. Its totient is φ = 31121112221158.

The previous prime is 31121112221093. The next prime is 31121112221183. The reversal of 31121112221159 is 95112221112113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31121112221159 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31121112221189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560556110579 + 15560556110580.

It is an arithmetic number, because the mean of its divisors is an integer number (15560556110580).

Almost surely, 2^{31121112221159} is an apocalyptic number.

31121112221159 is a deficient number, since it is larger than the sum of its proper divisors (1).

31121112221159 is an equidigital number, since it uses as much as digits as its factorization.

31121112221159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 32.

The spelling of 31121112221159 in words is "thirty-one trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred fifty-nine".