22111212222212 has 12 divisors (see below), whose sum is σ = 38715214601280. Its totient is φ = 11049722336136.

The previous prime is 22111212222191. The next prime is 22111212222271. The reversal of 22111212222212 is 21222221211122.

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 3 ways as a sum of consecutive naturals, for example, 1470935288 + ... + 1470950319.

It is an arithmetic number, because the mean of its divisors is an integer number (3226267883440).

Almost surely, 2^{22111212222212} is an apocalyptic number.

It is an amenable number.

22111212222212 is a deficient number, since it is larger than the sum of its proper divisors (16604002379068).

22111212222212 is a wasteful number, since it uses less digits than its factorization.

22111212222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941887490 (or 2941887488 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

Adding to 22111212222212 its reverse (21222221211122), we get a palindrome (43333433433334).

The spelling of 22111212222212 in words is "twenty-two trillion, one hundred eleven billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twelve".