22212110202221 has 4 divisors (see below), whose sum is σ = 22237152040992. Its totient is φ = 22187068363452.

The previous prime is 22212110202197. The next prime is 22212110202229. The reversal of 22212110202221 is 12220201121222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22212110202221 - 2¹⁸ = 22212109940077 is a prime.

It is a super-2 number, since 2×22212110202221² (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 = 22212110202193 and 22212110202202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212110202229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12520918055 + ... + 12520919828.

It is an arithmetic number, because the mean of its divisors is an integer number (5559288010248).

Almost surely, 2^{22212110202221} is an apocalyptic number.

It is an amenable number.

22212110202221 is a deficient number, since it is larger than the sum of its proper divisors (25041838771).

22212110202221 is an equidigital number, since it uses as much as digits as its factorization.

22212110202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25041838770.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22212110202221 its reverse (12220201121222), we get a palindrome (34432311323443).

The spelling of 22212110202221 in words is "twenty-two trillion, two hundred twelve billion, one hundred ten million, two hundred two thousand, two hundred twenty-one".