22200010121 has 4 divisors (see below), whose sum is σ = 22200311700. Its totient is φ = 22199708544.

The previous prime is 22200010111. The next prime is 22200010141. The reversal of 22200010121 is 12101000222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9698310400 + 12501699721 = 98480^2 + 111811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22200010121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22200010111) 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, 40625 + ... + 214593.

It is an arithmetic number, because the mean of its divisors is an integer number (5550077925).

Almost surely, 2^22200010121 is an apocalyptic number.

It is an amenable number.

22200010121 is a deficient number, since it is larger than the sum of its proper divisors (301579).

22200010121 is a wasteful number, since it uses less digits than its factorization.

22200010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301578.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22200010121 its reverse (12101000222), we get a palindrome (34301010343).

The spelling of 22200010121 in words is "twenty-two billion, two hundred million, ten thousand, one hundred twenty-one".