125505131420051 has 16 divisors (see below), whose sum is σ = 128645404588800. Its totient is φ = 122399195100000.

The previous prime is 125505131420023. The next prime is 125505131420069. The reversal of 125505131420051 is 150024131505521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125505131420051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125505131419993 and 125505131420020.

It is not an unprimeable number, because it can be changed into a prime (125505131420951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23206301 + ... + 28098801.

It is an arithmetic number, because the mean of its divisors is an integer number (8040337786800).

Almost surely, 2^{125505131420051} is an apocalyptic number.

125505131420051 is a deficient number, since it is larger than the sum of its proper divisors (3140273168749).

125505131420051 is a wasteful number, since it uses less digits than its factorization.

125505131420051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896010.

The product of its (nonzero) digits is 30000, while the sum is 35.

Adding to 125505131420051 its reverse (150024131505521), we get a palindrome (275529262925572).

The spelling of 125505131420051 in words is "one hundred twenty-five trillion, five hundred five billion, one hundred thirty-one million, four hundred twenty thousand, fifty-one".