31211320339 has 2 divisors, whose sum is σ = 31211320340. Its totient is φ = 31211320338.

The previous prime is 31211320291. The next prime is 31211320351. The reversal of 31211320339 is 93302311213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31211320339 - 2³¹ = 29063836691 is a prime.

It is not a weakly prime, because it can be changed into another prime (31211320369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605660169 + 15605660170.

It is an arithmetic number, because the mean of its divisors is an integer number (15605660170).

Almost surely, 2^31211320339 is an apocalyptic number.

31211320339 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211320339 is an equidigital number, since it uses as much as digits as its factorization.

31211320339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 31211320339 in words is "thirty-one billion, two hundred eleven million, three hundred twenty thousand, three hundred thirty-nine".