125561045101 has 4 divisors (see below), whose sum is σ = 125579783872. Its totient is φ = 125542306332.

The previous prime is 125561045089. The next prime is 125561045117. The reversal of 125561045101 is 101540165521.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101540165521 = 17 ⋅5972950913.

It is a cyclic number.

It is not a de Polignac number, because 125561045101 - 2²⁹ = 125024174189 is a prime.

It is a super-2 number, since 2×125561045101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125561045131) 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, 9359331 + ... + 9372736.

It is an arithmetic number, because the mean of its divisors is an integer number (31394945968).

Almost surely, 2^125561045101 is an apocalyptic number.

It is an amenable number.

125561045101 is a deficient number, since it is larger than the sum of its proper divisors (18738771).

125561045101 is an equidigital number, since it uses as much as digits as its factorization.

125561045101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18738770.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 125561045101 in words is "one hundred twenty-five billion, five hundred sixty-one million, forty-five thousand, one hundred one".