125531211111 has 8 divisors (see below), whose sum is σ = 167547325824. Its totient is φ = 83601285240.

The previous prime is 125531211107. The next prime is 125531211163. The reversal of 125531211111 is 111112135521.

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

It is not a de Polignac number, because 125531211111 - 2² = 125531211107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125531211191) 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, 21543811 + ... + 21549636.

It is an arithmetic number, because the mean of its divisors is an integer number (20943415728).

Almost surely, 2^125531211111 is an apocalyptic number.

125531211111 is a deficient number, since it is larger than the sum of its proper divisors (42016114713).

125531211111 is an equidigital number, since it uses as much as digits as its factorization.

125531211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43094421.

The product of its digits is 300, while the sum is 24.

Adding to 125531211111 its reverse (111112135521), we get a palindrome (236643346632).

The spelling of 125531211111 in words is "one hundred twenty-five billion, five hundred thirty-one million, two hundred eleven thousand, one hundred eleven".