125877230621 has 4 divisors (see below), whose sum is σ = 126150283644. Its totient is φ = 125604177600.

The previous prime is 125877230617. The next prime is 125877230623. The reversal of 125877230621 is 126032778521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126032778521 = 13 ⋅9694829117.

It can be written as a sum of positive squares in 2 ways, for example, as 20739168121 + 105138062500 = 144011^2 + 324250^2 .

It is a cyclic number.

It is not a de Polignac number, because 125877230621 - 2² = 125877230617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125877230623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136525820 + ... + 136526741.

It is an arithmetic number, because the mean of its divisors is an integer number (31537570911).

Almost surely, 2^125877230621 is an apocalyptic number.

It is an amenable number.

125877230621 is a deficient number, since it is larger than the sum of its proper divisors (273053023).

125877230621 is an equidigital number, since it uses as much as digits as its factorization.

125877230621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273053022.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 125877230621 in words is "one hundred twenty-five billion, eight hundred seventy-seven million, two hundred thirty thousand, six hundred twenty-one".