22121661324 has 36 divisors (see below), whose sum is σ = 60044510904. Its totient is φ = 6320474496.

The previous prime is 22121661323. The next prime is 22121661329. The reversal of 22121661324 is 42316612122.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 22121661291 and 22121661300.

It is not an unprimeable number, because it can be changed into a prime (22121661323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18810349 + ... + 18811524.

Almost surely, 2^22121661324 is an apocalyptic number.

It is an amenable number.

22121661324 is an abundant number, since it is smaller than the sum of its proper divisors (37922849580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121661324 is a wasteful number, since it uses less digits than its factorization.

22121661324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37621894 (or 37621885 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The spelling of 22121661324 in words is "twenty-two billion, one hundred twenty-one million, six hundred sixty-one thousand, three hundred twenty-four".