22210202011221 has 96 divisors (see below), whose sum is σ = 37796134311936. Its totient is φ = 12302429040000.

The previous prime is 22210202011157. The next prime is 22210202011279. The reversal of 22210202011221 is 12211020201222.

It is a happy number.

22210202011221 is a `hidden beast` number, since 2 + 221 + 0 + 20 + 201 + 1 + 221 = 666.

It is not a de Polignac number, because 22210202011221 - 2⁶ = 22210202011157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22210202011194 and 22210202011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210202011321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1165819146 + ... + 1165838196.

It is an arithmetic number, because the mean of its divisors is an integer number (393709732416).

Almost surely, 2^{22210202011221} is an apocalyptic number.

22210202011221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22210202011221 is a deficient number, since it is larger than the sum of its proper divisors (15585932300715).

22210202011221 is a wasteful number, since it uses less digits than its factorization.

22210202011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20943 (or 20940 counting only the distinct ones).

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

Adding to 22210202011221 its reverse (12211020201222), we get a palindrome (34421222212443).

The spelling of 22210202011221 in words is "twenty-two trillion, two hundred ten billion, two hundred two million, eleven thousand, two hundred twenty-one".