22210120021221 has 32 divisors (see below), whose sum is σ = 37455801891840. Its totient is φ = 12875431892400.

The previous prime is 22210120021153. The next prime is 22210120021223. The reversal of 22210120021221 is 12212002101222.

It is a happy number.

22210120021221 is a `hidden beast` number, since 2 + 221 + 0 + 1 + 200 + 21 + 221 = 666.

It is not a de Polignac number, because 22210120021221 - 2⁷ = 22210120021093 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22210120021194 and 22210120021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210120021223) 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, 1625679015 + ... + 1625692676.

It is an arithmetic number, because the mean of its divisors is an integer number (1170493809120).

Almost surely, 2^{22210120021221} is an apocalyptic number.

It is an amenable number.

22210120021221 is a deficient number, since it is larger than the sum of its proper divisors (15245681870619).

22210120021221 is a wasteful number, since it uses less digits than its factorization.

22210120021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251371734 (or 3251371728 counting only the distinct ones).

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

Adding to 22210120021221 its reverse (12212002101222), we get a palindrome (34422122122443).

The spelling of 22210120021221 in words is "twenty-two trillion, two hundred ten billion, one hundred twenty million, twenty-one thousand, two hundred twenty-one".