51001120129 has 2 divisors, whose sum is σ = 51001120130. Its totient is φ = 51001120128.

The previous prime is 51001120099. The next prime is 51001120133. The reversal of 51001120129 is 92102110015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50952678529 + 48441600 = 225727^2 + 6960^2 .

It is a cyclic number.

It is not a de Polignac number, because 51001120129 - 2¹¹ = 51001118081 is a prime.

It is a super-2 number, since 2×51001120129² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51001120169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500560064 + 25500560065.

It is an arithmetic number, because the mean of its divisors is an integer number (25500560065).

Almost surely, 2^51001120129 is an apocalyptic number.

It is an amenable number.

51001120129 is a deficient number, since it is larger than the sum of its proper divisors (1).

51001120129 is an equidigital number, since it uses as much as digits as its factorization.

51001120129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 22.

The spelling of 51001120129 in words is "fifty-one billion, one million, one hundred twenty thousand, one hundred twenty-nine".