125953704021 has 64 divisors (see below), whose sum is σ = 184141900800. Its totient is φ = 76272869376.

The previous prime is 125953703989. The next prime is 125953704053. The reversal of 125953704021 is 120407359521.

It is an interprime number because it is at equal distance from previous prime (125953703989) and next prime (125953704053).

It is not a de Polignac number, because 125953704021 - 2⁵ = 125953703989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125953704221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60875575 + ... + 60877643.

It is an arithmetic number, because the mean of its divisors is an integer number (2877217200).

Almost surely, 2^125953704021 is an apocalyptic number.

It is an amenable number.

125953704021 is a deficient number, since it is larger than the sum of its proper divisors (58188196779).

125953704021 is a wasteful number, since it uses less digits than its factorization.

125953704021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 125953704021 in words is "one hundred twenty-five billion, nine hundred fifty-three million, seven hundred four thousand, twenty-one".