136113015251621 has 2 divisors, whose sum is σ = 136113015251622. Its totient is φ = 136113015251620.

The previous prime is 136113015251557. The next prime is 136113015251761. The reversal of 136113015251621 is 126152510311631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81813580747396 + 54299434504225 = 9045086^2 + 7368815^2 .

It is an emirp because it is prime and its reverse (126152510311631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136113015251621 - 2⁶ = 136113015251557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136113015254621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68056507625810 + 68056507625811.

It is an arithmetic number, because the mean of its divisors is an integer number (68056507625811).

Almost surely, 2^{136113015251621} is an apocalyptic number.

It is an amenable number.

136113015251621 is a deficient number, since it is larger than the sum of its proper divisors (1).

136113015251621 is an equidigital number, since it uses as much as digits as its factorization.

136113015251621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 136113015251621 in words is "one hundred thirty-six trillion, one hundred thirteen billion, fifteen million, two hundred fifty-one thousand, six hundred twenty-one".