22212221120221 has 4 divisors (see below), whose sum is σ = 24231513949344. Its totient is φ = 20192928291100.

The previous prime is 22212221120213. The next prime is 22212221120263. The reversal of 22212221120221 is 12202112221222.

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 22212221120221 - 2³ = 22212221120213 is a prime.

It is a super-2 number, since 2×22212221120221² (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 = 22212221120192 and 22212221120201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212221120021) 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, 1009646414545 + ... + 1009646414566.

It is an arithmetic number, because the mean of its divisors is an integer number (6057878487336).

Almost surely, 2^{22212221120221} is an apocalyptic number.

It is an amenable number.

22212221120221 is a deficient number, since it is larger than the sum of its proper divisors (2019292829123).

22212221120221 is a wasteful number, since it uses less digits than its factorization.

22212221120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019292829122.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22212221120221 its reverse (12202112221222), we get a palindrome (34414333341443).

The spelling of 22212221120221 in words is "twenty-two trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".