22101211111212 has 72 divisors (see below), whose sum is σ = 59235514228800. Its totient is φ = 6924069600768.

The previous prime is 22101211111183. The next prime is 22101211111249. The reversal of 22101211111212 is 21211111210122.

It is a happy number.

22101211111212 is a `hidden beast` number, since 221 + 0 + 121 + 1 + 111 + 212 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24673387 + ... + 25553442.

It is an arithmetic number, because the mean of its divisors is an integer number (822715475400).

Almost surely, 2^{22101211111212} is an apocalyptic number.

It is an amenable number.

22101211111212 is an abundant number, since it is smaller than the sum of its proper divisors (37134303117588).

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

22101211111212 is a wasteful number, since it uses less digits than its factorization.

22101211111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50227575 (or 50227570 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22101211111212 its reverse (21211111210122), we get a palindrome (43312322321334).

The spelling of 22101211111212 in words is "twenty-two trillion, one hundred one billion, two hundred eleven million, one hundred eleven thousand, two hundred twelve".