22121661226 has 12 divisors (see below), whose sum is σ = 38600041698. Its totient is φ = 9480711912.

The previous prime is 22121661209. The next prime is 22121661229. The reversal of 22121661226 is 62216612122.

It can be written as a sum of positive squares in only one way, i.e., 16422166201 + 5699495025 = 128149^2 + 75495^2 .

It is not an unprimeable number, because it can be changed into a prime (22121661229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112865521 + ... + 112865716.

Almost surely, 2^22121661226 is an apocalyptic number.

22121661226 is a deficient number, since it is larger than the sum of its proper divisors (16478380472).

22121661226 is a wasteful number, since it uses less digits than its factorization.

22121661226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225731253 (or 225731246 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The spelling of 22121661226 in words is "twenty-two billion, one hundred twenty-one million, six hundred sixty-one thousand, two hundred twenty-six".