22202221111221 has 24 divisors (see below), whose sum is σ = 30466680881824. Its totient is φ = 14371358597280.

The previous prime is 22202221111177. The next prime is 22202221111243. The reversal of 22202221111221 is 12211112220222.

It is not a de Polignac number, because 22202221111221 - 2¹⁸ = 22202220849077 is a prime.

It is a super-2 number, since 2×22202221111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22202221161221) 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, 25032066 + ... + 25903836.

Almost surely, 2^{22202221111221} is an apocalyptic number.

It is an amenable number.

22202221111221 is a deficient number, since it is larger than the sum of its proper divisors (8264459770603).

22202221111221 is an frugal number, since it uses more digits than its factorization.

22202221111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872769 (or 872290 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22202221111221 its reverse (12211112220222), we get a palindrome (34413333331443).

The spelling of 22202221111221 in words is "twenty-two trillion, two hundred two billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".