22220200021121 has 4 divisors (see below), whose sum is σ = 22220774655744. Its totient is φ = 22219625386500.

The previous prime is 22220200021087. The next prime is 22220200021181. The reversal of 22220200021121 is 12112000202222.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-22220200021121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22220200021121.

It is not an unprimeable number, because it can be changed into a prime (22220200021181) 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, 287259305 + ... + 287336646.

It is an arithmetic number, because the mean of its divisors is an integer number (5555193663936).

Almost surely, 2^{22220200021121} is an apocalyptic number.

It is an amenable number.

22220200021121 is a deficient number, since it is larger than the sum of its proper divisors (574634623).

22220200021121 is an equidigital number, since it uses as much as digits as its factorization.

22220200021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574634622.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22220200021121 its reverse (12112000202222), we get a palindrome (34332200223343).

The spelling of 22220200021121 in words is "twenty-two trillion, two hundred twenty billion, two hundred million, twenty-one thousand, one hundred twenty-one".