22012211101221 has 32 divisors (see below), whose sum is σ = 35713716048000. Its totient is φ = 13288824483840.

The previous prime is 22012211101129. The next prime is 22012211101247. The reversal of 22012211101221 is 12210111221022.

22012211101221 is a `hidden beast` number, since 220 + 1 + 2 + 211 + 10 + 1 + 221 = 666.

It is not a de Polignac number, because 22012211101221 - 2¹⁷ = 22012210970149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22012211101194 and 22012211101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012211100221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144116646 + ... + 144269303.

It is an arithmetic number, because the mean of its divisors is an integer number (1116053626500).

Almost surely, 2^{22012211101221} is an apocalyptic number.

It is an amenable number.

22012211101221 is a deficient number, since it is larger than the sum of its proper divisors (13701504946779).

22012211101221 is a wasteful number, since it uses less digits than its factorization.

22012211101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288386226 (or 288386220 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22012211101221 its reverse (12210111221022), we get a palindrome (34222322322243).

The spelling of 22012211101221 in words is "twenty-two trillion, twelve billion, two hundred eleven million, one hundred one thousand, two hundred twenty-one".