13220031971 has 2 divisors, whose sum is σ = 13220031972. Its totient is φ = 13220031970.

The previous prime is 13220031949. The next prime is 13220032073. The reversal of 13220031971 is 17913002231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13220031971 is a prime.

It is not a weakly prime, because it can be changed into another prime (13220031371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610015985 + 6610015986.

It is an arithmetic number, because the mean of its divisors is an integer number (6610015986).

Almost surely, 2^13220031971 is an apocalyptic number.

13220031971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220031971 is an equidigital number, since it uses as much as digits as its factorization.

13220031971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The spelling of 13220031971 in words is "thirteen billion, two hundred twenty million, thirty-one thousand, nine hundred seventy-one".