22021212109998 has 8 divisors (see below), whose sum is σ = 44042424220008. Its totient is φ = 7340404036664.

The previous prime is 22021212109957. The next prime is 22021212110003. The reversal of 22021212109998 is 89990121212022.

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

22021212109998 is an admirable number.

It is a congruent 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, 1835101009161 + ... + 1835101009172.

It is an arithmetic number, because the mean of its divisors is an integer number (5505303027501).

Almost surely, 2^{22021212109998} is an apocalyptic number.

22021212109998 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.

22021212109998 is a wasteful number, since it uses less digits than its factorization.

22021212109998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670202018338.

The product of its (nonzero) digits is 186624, while the sum is 48.

The spelling of 22021212109998 in words is "twenty-two trillion, twenty-one billion, two hundred twelve million, one hundred nine thousand, nine hundred ninety-eight".