22111121211212 has 24 divisors (see below), whose sum is σ = 42212272919040. Its totient is φ = 10050478111760.

The previous prime is 22111121211167. The next prime is 22111121211233. The reversal of 22111121211212 is 21211212111122.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18950489 + ... + 20083407.

It is an arithmetic number, because the mean of its divisors is an integer number (1758844704960).

Almost surely, 2^{22111121211212} is an apocalyptic number.

22111121211212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22111121211212 is a deficient number, since it is larger than the sum of its proper divisors (20101151707828).

22111121211212 is a wasteful number, since it uses less digits than its factorization.

22111121211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576501 (or 1576499 counting only the distinct ones).

The product of its digits is 64, while the sum is 20.

Adding to 22111121211212 its reverse (21211212111122), we get a palindrome (43322333322334).

The spelling of 22111121211212 in words is "twenty-two trillion, one hundred eleven billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".