125231120155 has 4 divisors (see below), whose sum is σ = 150277344192. Its totient is φ = 100184896120.

The previous prime is 125231120141. The next prime is 125231120173. The reversal of 125231120155 is 551021132521.

It is a happy number.

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

It is not a de Polignac number, because 125231120155 - 2¹¹ = 125231118107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12523112011 + ... + 12523112020.

It is an arithmetic number, because the mean of its divisors is an integer number (37569336048).

Almost surely, 2^125231120155 is an apocalyptic number.

125231120155 is a deficient number, since it is larger than the sum of its proper divisors (25046224037).

125231120155 is an equidigital number, since it uses as much as digits as its factorization.

125231120155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25046224036.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 125231120155 its reverse (551021132521), we get a palindrome (676252252676).

The spelling of 125231120155 in words is "one hundred twenty-five billion, two hundred thirty-one million, one hundred twenty thousand, one hundred fifty-five".