2200121022221 has 4 divisors (see below), whose sum is σ = 2201177251392. Its totient is φ = 2199064793052.

The previous prime is 2200121022217. The next prime is 2200121022241. The reversal of 2200121022221 is 1222201210022.

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 not a de Polignac number, because 2200121022221 - 2² = 2200121022217 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 2200121022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200121022241) 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, 528111461 + ... + 528115626.

It is an arithmetic number, because the mean of its divisors is an integer number (550294312848).

Almost surely, 2^{2200121022221} is an apocalyptic number.

It is an amenable number.

2200121022221 is a deficient number, since it is larger than the sum of its proper divisors (1056229171).

2200121022221 is a wasteful number, since it uses less digits than its factorization.

2200121022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056229170.

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

Adding to 2200121022221 its reverse (1222201210022), we get a palindrome (3422322232243).

The spelling of 2200121022221 in words is "two trillion, two hundred billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-one".