7211405979731 has 2 divisors, whose sum is σ = 7211405979732. Its totient is φ = 7211405979730.

The previous prime is 7211405979719. The next prime is 7211405979773. The reversal of 7211405979731 is 1379795041127.

It is a weak prime.

It is an emirp because it is prime and its reverse (1379795041127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7211405979731 - 2²⁶ = 7211338870867 is a prime.

It is a super-2 number, since 2×7211405979731² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (7211405973731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3605702989865 + 3605702989866.

It is an arithmetic number, because the mean of its divisors is an integer number (3605702989866).

Almost surely, 2^{7211405979731} is an apocalyptic number.

7211405979731 is a deficient number, since it is larger than the sum of its proper divisors (1).

7211405979731 is an equidigital number, since it uses as much as digits as its factorization.

7211405979731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3333960, while the sum is 56.

The spelling of 7211405979731 in words is "seven trillion, two hundred eleven billion, four hundred five million, nine hundred seventy-nine thousand, seven hundred thirty-one".