125111111211 has 6 divisors (see below), whose sum is σ = 180716049540. Its totient is φ = 83407407468.

The previous prime is 125111111143. The next prime is 125111111233. The reversal of 125111111211 is 112111111521.

It is not a de Polignac number, because 125111111211 - 2²⁹ = 124574240299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125111101211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6950617281 + ... + 6950617298.

It is an arithmetic number, because the mean of its divisors is an integer number (30119341590).

Almost surely, 2^125111111211 is an apocalyptic number.

125111111211 is a deficient number, since it is larger than the sum of its proper divisors (55604938329).

125111111211 is a wasteful number, since it uses less digits than its factorization.

125111111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13901234585 (or 13901234582 counting only the distinct ones).

The product of its digits is 20, while the sum is 18.

Adding to 125111111211 its reverse (112111111521), we get a palindrome (237222222732).

The spelling of 125111111211 in words is "one hundred twenty-five billion, one hundred eleven million, one hundred eleven thousand, two hundred eleven".