22120111021221 has 12 divisors (see below), whose sum is σ = 31951352935840. Its totient is φ = 14746703083560.

The previous prime is 22120111021219. The next prime is 22120111021231. The reversal of 22120111021221 is 12212011102122.

22120111021221 is a `hidden beast` number, since 221 + 201 + 1 + 1 + 0 + 21 + 221 = 666.

It is not a de Polignac number, because 22120111021221 - 2¹ = 22120111021219 is a prime.

It is a super-2 number, since 2×22120111021221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120111021194 and 22120111021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120111021231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 861066 + ... + 6706836.

Almost surely, 2^{22120111021221} is an apocalyptic number.

It is an amenable number.

22120111021221 is a deficient number, since it is larger than the sum of its proper divisors (9831241914619).

22120111021221 is a wasteful number, since it uses less digits than its factorization.

22120111021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6266216 (or 6266213 counting only the distinct ones).

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

Adding to 22120111021221 its reverse (12212011102122), we get a palindrome (34332122123343).

The spelling of 22120111021221 in words is "twenty-two trillion, one hundred twenty billion, one hundred eleven million, twenty-one thousand, two hundred twenty-one".