125614563121 has 4 divisors (see below), whose sum is σ = 125889431332. Its totient is φ = 125339694912.

The previous prime is 125614563103. The next prime is 125614563161. The reversal of 125614563121 is 121365416521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42255324721 + 83359238400 = 205561^2 + 288720^2 .

It is a cyclic number.

It is not a de Polignac number, because 125614563121 - 2¹¹ = 125614561073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125614563161) 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, 137433420 + ... + 137434333.

It is an arithmetic number, because the mean of its divisors is an integer number (31472357833).

Almost surely, 2^125614563121 is an apocalyptic number.

It is an amenable number.

125614563121 is a deficient number, since it is larger than the sum of its proper divisors (274868211).

125614563121 is an equidigital number, since it uses as much as digits as its factorization.

125614563121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274868210.

The product of its digits is 43200, while the sum is 37.

Adding to 125614563121 its reverse (121365416521), we get a palindrome (246979979642).

The spelling of 125614563121 in words is "one hundred twenty-five billion, six hundred fourteen million, five hundred sixty-three thousand, one hundred twenty-one".