7211299681 has 2 divisors, whose sum is σ = 7211299682. Its totient is φ = 7211299680.

The previous prime is 7211299673. The next prime is 7211299709. The reversal of 7211299681 is 1869921127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6635731600 + 575568081 = 81460^2 + 23991^2 .

It is a cyclic number.

It is not a de Polignac number, because 7211299681 - 2³ = 7211299673 is a prime.

It is a super-2 number, since 2×7211299681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7211299631) 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, 3605649840 + 3605649841.

It is an arithmetic number, because the mean of its divisors is an integer number (3605649841).

Almost surely, 2^7211299681 is an apocalyptic number.

It is an amenable number.

7211299681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7211299681 is an equidigital number, since it uses as much as digits as its factorization.

7211299681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 46.

The square root of 7211299681 is about 84919.3716474633. The cubic root of 7211299681 is about 1931.9884006729.

The spelling of 7211299681 in words is "seven billion, two hundred eleven million, two hundred ninety-nine thousand, six hundred eighty-one".