125111722501 has 4 divisors (see below), whose sum is σ = 125132418432. Its totient is φ = 125091026572.

The previous prime is 125111722453. The next prime is 125111722523. The reversal of 125111722501 is 105227111521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125111722501 - 2¹⁹ = 125111198213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125111722501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125111722591) 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, 10338895 + ... + 10350988.

It is an arithmetic number, because the mean of its divisors is an integer number (31283104608).

Almost surely, 2^125111722501 is an apocalyptic number.

It is an amenable number.

125111722501 is a deficient number, since it is larger than the sum of its proper divisors (20695931).

125111722501 is an equidigital number, since it uses as much as digits as its factorization.

125111722501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20695930.

The product of its (nonzero) digits is 1400, while the sum is 28.

The spelling of 125111722501 in words is "one hundred twenty-five billion, one hundred eleven million, seven hundred twenty-two thousand, five hundred one".