22121200990 has 32 divisors (see below), whose sum is σ = 46277775360. Its totient is φ = 7455861024.

The previous prime is 22121200987. The next prime is 22121200991. The reversal of 22121200990 is 9900212122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121200991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2673982 + ... + 2682241.

It is an arithmetic number, because the mean of its divisors is an integer number (1446180480).

Almost surely, 2^22121200990 is an apocalyptic number.

22121200990 is an abundant number, since it is smaller than the sum of its proper divisors (24156574370).

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

22121200990 is a wasteful number, since it uses less digits than its factorization.

22121200990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356296.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 22121200990 in words is "twenty-two billion, one hundred twenty-one million, two hundred thousand, nine hundred ninety".