111212112011 has 24 divisors (see below), whose sum is σ = 151986192624. Its totient is φ = 79992722880.

The previous prime is 111212111999. The next prime is 111212112049. The reversal of 111212112011 is 110211212111.

It is not a de Polignac number, because 111212112011 - 2⁶ = 111212111947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111212112071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7928780 + ... + 7942793.

It is an arithmetic number, because the mean of its divisors is an integer number (6332758026).

Almost surely, 2^111212112011 is an apocalyptic number.

111212112011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111212112011 is a deficient number, since it is larger than the sum of its proper divisors (40774080613).

111212112011 is a wasteful number, since it uses less digits than its factorization.

111212112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15871611 (or 15871604 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111212112011 its reverse (110211212111), we get a palindrome (221423324122).

The spelling of 111212112011 in words is "one hundred eleven billion, two hundred twelve million, one hundred twelve thousand, eleven".