22021221111212 has 24 divisors (see below), whose sum is σ = 39578550691680. Its totient is φ = 10714444499840.

The previous prime is 22021221111209. The next prime is 22021221111247. The reversal of 22021221111212 is 21211112212022.

22021221111212 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172527128 + ... + 172654719.

It is an arithmetic number, because the mean of its divisors is an integer number (1649106278820).

Almost surely, 2^{22021221111212} is an apocalyptic number.

It is an amenable number.

22021221111212 is a deficient number, since it is larger than the sum of its proper divisors (17557329580468).

22021221111212 is a wasteful number, since it uses less digits than its factorization.

22021221111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345182281 (or 345182279 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22021221111212 its reverse (21211112212022), we get a palindrome (43232333323234).

The spelling of 22021221111212 in words is "twenty-two trillion, twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twelve".