11222221111212 has 24 divisors (see below), whose sum is σ = 26892890231536. Its totient is φ = 3639639279168.

The previous prime is 11222221111169. The next prime is 11222221111219. The reversal of 11222221111212 is 21211112222211.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11222221111219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12637635943 + ... + 12637636830.

Almost surely, 2^{11222221111212} is an apocalyptic number.

11222221111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11222221111212 is an abundant number, since it is smaller than the sum of its proper divisors (15670669120324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11222221111212 is a wasteful number, since it uses less digits than its factorization.

11222221111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25275272817 (or 25275272815 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

Adding to 11222221111212 its reverse (21211112222211), we get a palindrome (32433333333423).

The spelling of 11222221111212 in words is "eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twelve".