22101112212 has 12 divisors (see below), whose sum is σ = 51569261856. Its totient is φ = 7367037400.

The previous prime is 22101112171. The next prime is 22101112213. The reversal of 22101112212 is 21221110122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×22101112212² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22101112191 and 22101112200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101112213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920879664 + ... + 920879687.

It is an arithmetic number, because the mean of its divisors is an integer number (4297438488).

Almost surely, 2^22101112212 is an apocalyptic number.

It is an amenable number.

22101112212 is an abundant number, since it is smaller than the sum of its proper divisors (29468149644).

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

22101112212 is a wasteful number, since it uses less digits than its factorization.

22101112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841759358 (or 1841759356 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22101112212 its reverse (21221110122), we get a palindrome (43322222334).

The spelling of 22101112212 in words is "twenty-two billion, one hundred one million, one hundred twelve thousand, two hundred twelve".