22121132178 has 8 divisors (see below), whose sum is σ = 44242264368. Its totient is φ = 7373710724.

The previous prime is 22121132153. The next prime is 22121132213. The reversal of 22121132178 is 87123112122.

It is a sphenic number, since it is the product of 3 distinct primes.

22121132178 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1843427676 + ... + 1843427687.

It is an arithmetic number, because the mean of its divisors is an integer number (5530283046).

Almost surely, 2^22121132178 is an apocalyptic number.

22121132178 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22121132178 is a wasteful number, since it uses less digits than its factorization.

22121132178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686855368.

The product of its digits is 2688, while the sum is 30.

The spelling of 22121132178 in words is "twenty-two billion, one hundred twenty-one million, one hundred thirty-two thousand, one hundred seventy-eight".