22022011021212 has 18 divisors (see below), whose sum is σ = 55666750081488. Its totient is φ = 7340670340392.

The previous prime is 22022011021169. The next prime is 22022011021229. The reversal of 22022011021212 is 21212011022022.

It is a happy number.

22022011021212 is a `hidden beast` number, since 220 + 2 + 201 + 10 + 21 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×22022011021212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305861264148 + ... + 305861264219.

Almost surely, 2^{22022011021212} is an apocalyptic number.

It is an amenable number.

22022011021212 is an abundant number, since it is smaller than the sum of its proper divisors (33644739060276).

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

22022011021212 is a wasteful number, since it uses less digits than its factorization.

22022011021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611722528377 (or 611722528372 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22022011021212 its reverse (21212011022022), we get a palindrome (43234022043234).

The spelling of 22022011021212 in words is "twenty-two trillion, twenty-two billion, eleven million, twenty-one thousand, two hundred twelve".