12111112210 has 32 divisors (see below), whose sum is σ = 21955110912. Its totient is φ = 4810042560.

The previous prime is 12111112177. The next prime is 12111112229. The reversal of 12111112210 is 1221111121.

It is a happy number.

It is a super-2 number, since 2×12111112210² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1701519 + ... + 1708621.

It is an arithmetic number, because the mean of its divisors is an integer number (686097216).

Almost surely, 2^12111112210 is an apocalyptic number.

12111112210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111112210 is a deficient number, since it is larger than the sum of its proper divisors (9843998702).

12111112210 is a wasteful number, since it uses less digits than its factorization.

12111112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8298.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12111112210 its reverse (1221111121), we get a palindrome (13332223331).

The spelling of 12111112210 in words is "twelve billion, one hundred eleven million, one hundred twelve thousand, two hundred ten".