56011212555121 has 2 divisors, whose sum is σ = 56011212555122. Its totient is φ = 56011212555120.

The previous prime is 56011212555107. The next prime is 56011212555163. The reversal of 56011212555121 is 12155521211065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54004567488400 + 2006645066721 = 7348780^2 + 1416561^2 .

It is a cyclic number.

It is not a de Polignac number, because 56011212555121 - 2³⁷ = 55873773601649 is a prime.

It is not a weakly prime, because it can be changed into another prime (56011212555101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28005606277560 + 28005606277561.

It is an arithmetic number, because the mean of its divisors is an integer number (28005606277561).

Almost surely, 2^{56011212555121} is an apocalyptic number.

It is an amenable number.

56011212555121 is a deficient number, since it is larger than the sum of its proper divisors (1).

56011212555121 is an equidigital number, since it uses as much as digits as its factorization.

56011212555121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30000, while the sum is 37.

Adding to 56011212555121 its reverse (12155521211065), we get a palindrome (68166733766186).

The spelling of 56011212555121 in words is "fifty-six trillion, eleven billion, two hundred twelve million, five hundred fifty-five thousand, one hundred twenty-one".