12212220111 has 64 divisors (see below), whose sum is σ = 20664956928. Its totient is φ = 6242323968.

The previous prime is 12212220103. The next prime is 12212220121. The reversal of 12212220111 is 11102221221.

It is not a de Polignac number, because 12212220111 - 2³ = 12212220103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212220121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2654265 + ... + 2658861.

It is an arithmetic number, because the mean of its divisors is an integer number (322889952).

Almost surely, 2^12212220111 is an apocalyptic number.

12212220111 is a deficient number, since it is larger than the sum of its proper divisors (8452736817).

12212220111 is a wasteful number, since it uses less digits than its factorization.

12212220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4920.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12212220111 its reverse (11102221221), we get a palindrome (23314441332).

It can be divided in two parts, 122122 and 20111, that multiplied together give a palindrome (2455995542).

The spelling of 12212220111 in words is "twelve billion, two hundred twelve million, two hundred twenty thousand, one hundred eleven".