125023612021 has 16 divisors (see below), whose sum is σ = 155954418048. Its totient is φ = 97370481600.

The previous prime is 125023612019. The next prime is 125023612039. The reversal of 125023612021 is 120216320521.

It is not a de Polignac number, because 125023612021 - 2¹ = 125023612019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125023612001) 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, 271150 + ... + 568831.

It is an arithmetic number, because the mean of its divisors is an integer number (9747151128).

Almost surely, 2^125023612021 is an apocalyptic number.

125023612021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125023612021 is a deficient number, since it is larger than the sum of its proper divisors (30930806027).

125023612021 is a wasteful number, since it uses less digits than its factorization.

125023612021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841932.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 125023612021 its reverse (120216320521), we get a palindrome (245239932542).

The spelling of 125023612021 in words is "one hundred twenty-five billion, twenty-three million, six hundred twelve thousand, twenty-one".