22121101218 has 8 divisors (see below), whose sum is σ = 44242202448. Its totient is φ = 7373700404.

The previous prime is 22121101217. The next prime is 22121101259. The reversal of 22121101218 is 81210112122.

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

22121101218 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 22121101194 and 22121101203.

It is not an unprimeable number, because it can be changed into a prime (22121101217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1843425096 + ... + 1843425107.

It is an arithmetic number, because the mean of its divisors is an integer number (5530275306).

Almost surely, 2^22121101218 is an apocalyptic number.

22121101218 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.

22121101218 is a wasteful number, since it uses less digits than its factorization.

22121101218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686850208.

The product of its (nonzero) digits is 128, while the sum is 21.

The spelling of 22121101218 in words is "twenty-two billion, one hundred twenty-one million, one hundred one thousand, two hundred eighteen".