56111601409121 has 2 divisors, whose sum is σ = 56111601409122. Its totient is φ = 56111601409120.

The previous prime is 56111601409069. The next prime is 56111601409133. The reversal of 56111601409121 is 12190410611165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38335427616721 + 17776173792400 = 6191561^2 + 4216180^2 .

It is a cyclic number.

It is not a de Polignac number, because 56111601409121 - 2²² = 56111597214817 is a prime.

It is not a weakly prime, because it can be changed into another prime (56111601409321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28055800704560 + 28055800704561.

It is an arithmetic number, because the mean of its divisors is an integer number (28055800704561).

Almost surely, 2^{56111601409121} is an apocalyptic number.

It is an amenable number.

56111601409121 is a deficient number, since it is larger than the sum of its proper divisors (1).

56111601409121 is an equidigital number, since it uses as much as digits as its factorization.

56111601409121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 38.

The spelling of 56111601409121 in words is "fifty-six trillion, one hundred eleven billion, six hundred one million, four hundred nine thousand, one hundred twenty-one".