21092632077521 has 2 divisors, whose sum is σ = 21092632077522. Its totient is φ = 21092632077520.

The previous prime is 21092632077437. The next prime is 21092632077553. The reversal of 21092632077521 is 12577023629012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20452689676225 + 639942401296 = 4522465^2 + 799964^2 .

It is a cyclic number.

It is not a de Polignac number, because 21092632077521 - 2¹⁰ = 21092632076497 is a prime.

It is not a weakly prime, because it can be changed into another prime (21092632077221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10546316038760 + 10546316038761.

It is an arithmetic number, because the mean of its divisors is an integer number (10546316038761).

Almost surely, 2^{21092632077521} is an apocalyptic number.

It is an amenable number.

21092632077521 is a deficient number, since it is larger than the sum of its proper divisors (1).

21092632077521 is an equidigital number, since it uses as much as digits as its factorization.

21092632077521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 21092632077521 in words is "twenty-one trillion, ninety-two billion, six hundred thirty-two million, seventy-seven thousand, five hundred twenty-one".