22001102221221 has 20 divisors (see below), whose sum is σ = 32866065592800. Its totient is φ = 14667302614536.

The previous prime is 22001102221213. The next prime is 22001102221289. The reversal of 22001102221221 is 12212220110022.

It is a happy number.

22001102221221 is a `hidden beast` number, since 220 + 0 + 1 + 1 + 0 + 2 + 221 + 221 = 666.

It is not a de Polignac number, because 22001102221221 - 2³ = 22001102221213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22001102221194 and 22001102221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001102229221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12355950 + ... + 14023968.

It is an arithmetic number, because the mean of its divisors is an integer number (1643303279640).

Almost surely, 2^{22001102221221} is an apocalyptic number.

It is an amenable number.

22001102221221 is a deficient number, since it is larger than the sum of its proper divisors (10864963371579).

22001102221221 is a wasteful number, since it uses less digits than its factorization.

22001102221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830870 (or 1830861 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22001102221221 its reverse (12212220110022), we get a palindrome (34213322331243).

The spelling of 22001102221221 in words is "twenty-two trillion, one billion, one hundred two million, two hundred twenty-one thousand, two hundred twenty-one".