22220213121 has 6 divisors (see below), whose sum is σ = 32095863410. Its totient is φ = 14813475408.

The previous prime is 22220213107. The next prime is 22220213131. The reversal of 22220213121 is 12131202222.

It can be written as a sum of positive squares in only one way, i.e., 22177166400 + 43046721 = 148920^2 + 6561^2 .

It is not a de Polignac number, because 22220213121 - 2²³ = 22211824513 is a prime.

It is a super-2 number, since 2×22220213121² (a number of 21 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 = 22220213094 and 22220213103.

It is not an unprimeable number, because it can be changed into a prime (22220213131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1234456276 + ... + 1234456293.

Almost surely, 2^22220213121 is an apocalyptic number.

It is an amenable number.

22220213121 is a deficient number, since it is larger than the sum of its proper divisors (9875650289).

22220213121 is a wasteful number, since it uses less digits than its factorization.

22220213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468912575 (or 2468912572 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22220213121 its reverse (12131202222), we get a palindrome (34351415343).

The spelling of 22220213121 in words is "twenty-two billion, two hundred twenty million, two hundred thirteen thousand, one hundred twenty-one".