13210221931 has 2 divisors, whose sum is σ = 13210221932. Its totient is φ = 13210221930.

The previous prime is 13210221929. The next prime is 13210221949. The reversal of 13210221931 is 13912201231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13210221931 - 2¹ = 13210221929 is a prime.

It is a super-2 number, since 2×13210221931² (a number of 21 digits) contains 22 as substring.

Together with 13210221929, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13210221896 and 13210221905.

It is not a weakly prime, because it can be changed into another prime (13210221911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605110965 + 6605110966.

It is an arithmetic number, because the mean of its divisors is an integer number (6605110966).

Almost surely, 2^13210221931 is an apocalyptic number.

13210221931 is a deficient number, since it is larger than the sum of its proper divisors (1).

13210221931 is an equidigital number, since it uses as much as digits as its factorization.

13210221931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 13210221931 in words is "thirteen billion, two hundred ten million, two hundred twenty-one thousand, nine hundred thirty-one".