22200231221 has 16 divisors (see below), whose sum is σ = 26799218688. Its totient is φ = 17986676400.

The previous prime is 22200231217. The next prime is 22200231233. The reversal of 22200231221 is 12213200222.

It is not a de Polignac number, because 22200231221 - 2² = 22200231217 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 22200231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200239221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1180265 + ... + 1198926.

It is an arithmetic number, because the mean of its divisors is an integer number (1674951168).

Almost surely, 2^22200231221 is an apocalyptic number.

It is an amenable number.

22200231221 is a deficient number, since it is larger than the sum of its proper divisors (4598987467).

22200231221 is a wasteful number, since it uses less digits than its factorization.

22200231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379272.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22200231221 its reverse (12213200222), we get a palindrome (34413431443).

The spelling of 22200231221 in words is "twenty-two billion, two hundred million, two hundred thirty-one thousand, two hundred twenty-one".