56373730121 has 2 divisors, whose sum is σ = 56373730122. Its totient is φ = 56373730120.

The previous prime is 56373730117. The next prime is 56373730139. The reversal of 56373730121 is 12103737365.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47805636025 + 8568094096 = 218645^2 + 92564^2 .

It is a cyclic number.

It is not a de Polignac number, because 56373730121 - 2² = 56373730117 is a prime.

It is not a weakly prime, because it can be changed into another prime (56373730921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28186865060 + 28186865061.

It is an arithmetic number, because the mean of its divisors is an integer number (28186865061).

Almost surely, 2^56373730121 is an apocalyptic number.

It is an amenable number.

56373730121 is a deficient number, since it is larger than the sum of its proper divisors (1).

56373730121 is an equidigital number, since it uses as much as digits as its factorization.

56373730121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 38.

The spelling of 56373730121 in words is "fifty-six billion, three hundred seventy-three million, seven hundred thirty thousand, one hundred twenty-one".