22101120121221 has 24 divisors (see below), whose sum is σ = 32049743119680. Its totient is φ = 14675986835136.

The previous prime is 22101120121147. The next prime is 22101120121259. The reversal of 22101120121221 is 12212102110122.

22101120121221 is a `hidden beast` number, since 2 + 210 + 11 + 201 + 21 + 221 = 666.

It is not a de Polignac number, because 22101120121221 - 2²³ = 22101111732613 is a prime.

It is a super-2 number, since 2×22101120121221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22101120121194 and 22101120121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101120121021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16219470 + ... + 17529216.

It is an arithmetic number, because the mean of its divisors is an integer number (1335405963320).

Almost surely, 2^{22101120121221} is an apocalyptic number.

It is an amenable number.

22101120121221 is a deficient number, since it is larger than the sum of its proper divisors (9948622998459).

22101120121221 is a wasteful number, since it uses less digits than its factorization.

22101120121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317145 (or 1317142 counting only the distinct ones).

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

Adding to 22101120121221 its reverse (12212102110122), we get a palindrome (34313222231343).

The spelling of 22101120121221 in words is "twenty-two trillion, one hundred one billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".