125320023521 has 16 divisors (see below), whose sum is σ = 156250902528. Its totient is φ = 97647118800.

The previous prime is 125320023373. The next prime is 125320023529.

It is a happy number.

125320023521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 125320023521 - 2¹⁰ = 125320022497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125320023529) 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, 2928086 + ... + 2970576.

It is an arithmetic number, because the mean of its divisors is an integer number (9765681408).

Almost surely, 2^125320023521 is an apocalyptic number.

125320023521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125320023521 is a deficient number, since it is larger than the sum of its proper divisors (30930879007).

125320023521 is a wasteful number, since it uses less digits than its factorization.

125320023521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80812.

The product of its (nonzero) digits is 3600, while the sum is 26.

It can be divided in two parts, 1253200 and 23521, that added together give a palindrome (1276721).

The spelling of 125320023521 in words is "one hundred twenty-five billion, three hundred twenty million, twenty-three thousand, five hundred twenty-one".