125120155111 has 8 divisors (see below), whose sum is σ = 142999087104. Its totient is φ = 107242379160.

The previous prime is 125120155109. The next prime is 125120155123. The reversal of 125120155111 is 111551021521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125120155111 - 2¹ = 125120155109 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 (125120155211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43135 + ... + 502096.

It is an arithmetic number, because the mean of its divisors is an integer number (17874885888).

Almost surely, 2^125120155111 is an apocalyptic number.

125120155111 is a deficient number, since it is larger than the sum of its proper divisors (17878931993).

125120155111 is an equidigital number, since it uses as much as digits as its factorization.

125120155111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578021.

The product of its (nonzero) digits is 500, while the sum is 25.

Adding to 125120155111 its reverse (111551021521), we get a palindrome (236671176632).

The spelling of 125120155111 in words is "one hundred twenty-five billion, one hundred twenty million, one hundred fifty-five thousand, one hundred eleven".