236621400757421 has 2 divisors, whose sum is σ = 236621400757422. Its totient is φ = 236621400757420.

The previous prime is 236621400757397. The next prime is 236621400757433. The reversal of 236621400757421 is 124757004126632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119663361855625 + 116958038901796 = 10939075^2 + 10814714^2 .

It is a cyclic number.

It is not a de Polignac number, because 236621400757421 - 2¹⁰ = 236621400756397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 236621400757421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (236621400757481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118310700378710 + 118310700378711.

It is an arithmetic number, because the mean of its divisors is an integer number (118310700378711).

Almost surely, 2^{236621400757421} is an apocalyptic number.

It is an amenable number.

236621400757421 is a deficient number, since it is larger than the sum of its proper divisors (1).

236621400757421 is an equidigital number, since it uses as much as digits as its factorization.

236621400757421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 236621400757421 in words is "two hundred thirty-six trillion, six hundred twenty-one billion, four hundred million, seven hundred fifty-seven thousand, four hundred twenty-one".