111331212011 has 4 divisors (see below), whose sum is σ = 111375063000. Its totient is φ = 111287361024.

The previous prime is 111331211993. The next prime is 111331212023. The reversal of 111331212011 is 110212133111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111331212011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111331212061) 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, 21921686 + ... + 21926763.

It is an arithmetic number, because the mean of its divisors is an integer number (27843765750).

Almost surely, 2^111331212011 is an apocalyptic number.

111331212011 is a deficient number, since it is larger than the sum of its proper divisors (43850989).

111331212011 is an equidigital number, since it uses as much as digits as its factorization.

111331212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43850988.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111331212011 its reverse (110212133111), we get a palindrome (221543345122).

The spelling of 111331212011 in words is "one hundred eleven billion, three hundred thirty-one million, two hundred twelve thousand, eleven".