111431013211 has 32 divisors (see below), whose sum is σ = 142532352000. Its totient is φ = 84805926912.

The previous prime is 111431013179. The next prime is 111431013223. The reversal of 111431013211 is 112310134111.

It is not a de Polignac number, because 111431013211 - 2⁵ = 111431013179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (111431023211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437275 + ... + 643483.

It is an arithmetic number, because the mean of its divisors is an integer number (4454136000).

Almost surely, 2^111431013211 is an apocalyptic number.

111431013211 is a deficient number, since it is larger than the sum of its proper divisors (31101338789).

111431013211 is a wasteful number, since it uses less digits than its factorization.

111431013211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206491.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 111431013211 its reverse (112310134111), we get a palindrome (223741147322).

The spelling of 111431013211 in words is "one hundred eleven billion, four hundred thirty-one million, thirteen thousand, two hundred eleven".