22111222012 has 36 divisors (see below), whose sum is σ = 42556576048. Its totient is φ = 10044777600.

The previous prime is 22111221983. The next prime is 22111222031. The reversal of 22111222012 is 21022211122.

It is a happy number.

It is a super-2 number, since 2×22111222012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 894337 + ... + 918727.

Almost surely, 2^22111222012 is an apocalyptic number.

22111222012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22111222012 is a deficient number, since it is larger than the sum of its proper divisors (20445354036).

22111222012 is a wasteful number, since it uses less digits than its factorization.

22111222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26290 (or 26277 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22111222012 its reverse (21022211122), we get a palindrome (43133433134).

The spelling of 22111222012 in words is "twenty-two billion, one hundred eleven million, two hundred twenty-two thousand, twelve".