5126721376221 has 12 divisors (see below), whose sum is σ = 7481607141372. Its totient is φ = 3382579051776.

The previous prime is 5126721376187. The next prime is 5126721376229. The reversal of 5126721376221 is 1226731276215.

5126721376221 is a `hidden beast` number, since 5 + 1 + 2 + 6 + 7 + 2 + 13 + 7 + 622 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2376052688025 + 2750668688196 = 1541445^2 + 1658514^2 .

It is not a de Polignac number, because 5126721376221 - 2⁶ = 5126721376157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5126721376229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2936265666 + ... + 2936267411.

It is an arithmetic number, because the mean of its divisors is an integer number (623467261781).

Almost surely, 2^{5126721376221} is an apocalyptic number.

It is an amenable number.

5126721376221 is a deficient number, since it is larger than the sum of its proper divisors (2354885765151).

5126721376221 is a wasteful number, since it uses less digits than its factorization.

5126721376221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5872533180 (or 5872533177 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 5126721376221 in words is "five trillion, one hundred twenty-six billion, seven hundred twenty-one million, three hundred seventy-six thousand, two hundred twenty-one".