125213111 has 4 divisors (see below), whose sum is σ = 125675424. Its totient is φ = 124750800.

The previous prime is 125213087. The next prime is 125213113. The reversal of 125213111 is 111312521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111312521 = 4481 ⋅24841.

It is a cyclic number.

It is not a de Polignac number, because 125213111 - 2⁶ = 125213047 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 125213111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125213113) 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, 230750 + ... + 231291.

It is an arithmetic number, because the mean of its divisors is an integer number (31418856).

Almost surely, 2^125213111 is an apocalyptic number.

125213111 is a deficient number, since it is larger than the sum of its proper divisors (462313).

125213111 is an equidigital number, since it uses as much as digits as its factorization.

125213111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462312.

The product of its digits is 60, while the sum is 17.

The square root of 125213111 is about 11189.8664424559. The cubic root of 125213111 is about 500.2839866726.

Adding to 125213111 its reverse (111312521), we get a palindrome (236525632).

The spelling of 125213111 in words is "one hundred twenty-five million, two hundred thirteen thousand, one hundred eleven".