5164972722421 has 2 divisors, whose sum is σ = 5164972722422. Its totient is φ = 5164972722420.

The previous prime is 5164972722359. The next prime is 5164972722451. The reversal of 5164972722421 is 1242272794615.

5164972722421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4473588787396 + 691383935025 = 2115086^2 + 831495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5164972722421 is a prime.

It is a super-2 number, since 2×5164972722421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5164972722451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2582486361210 + 2582486361211.

It is an arithmetic number, because the mean of its divisors is an integer number (2582486361211).

Almost surely, 2^{5164972722421} is an apocalyptic number.

It is an amenable number.

5164972722421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5164972722421 is an equidigital number, since it uses as much as digits as its factorization.

5164972722421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 52.

The spelling of 5164972722421 in words is "five trillion, one hundred sixty-four billion, nine hundred seventy-two million, seven hundred twenty-two thousand, four hundred twenty-one".