13211999971 has 2 divisors, whose sum is σ = 13211999972. Its totient is φ = 13211999970.

The previous prime is 13211999953. The next prime is 13212000017. The reversal of 13211999971 is 17999911231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13211999971 - 2²³ = 13203611363 is a prime.

It is not a weakly prime, because it can be changed into another prime (13211991971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605999985 + 6605999986.

It is an arithmetic number, because the mean of its divisors is an integer number (6605999986).

Almost surely, 2^13211999971 is an apocalyptic number.

13211999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211999971 is an equidigital number, since it uses as much as digits as its factorization.

13211999971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 52.

The spelling of 13211999971 in words is "thirteen billion, two hundred eleven million, nine hundred ninety-nine thousand, nine hundred seventy-one".