22012121999 has 8 divisors (see below), whose sum is σ = 25569116448. Its totient is φ = 18558228960.

The previous prime is 22012121939. The next prime is 22012122007. The reversal of 22012121999 is 99912121022.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22012121999 - 2¹⁶ = 22012056463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012121909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25774892 + ... + 25775745.

It is an arithmetic number, because the mean of its divisors is an integer number (3196139556).

Almost surely, 2^22012121999 is an apocalyptic number.

22012121999 is a deficient number, since it is larger than the sum of its proper divisors (3556994449).

22012121999 is an equidigital number, since it uses as much as digits as its factorization.

22012121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51550705.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 22012121999 in words is "twenty-two billion, twelve million, one hundred twenty-one thousand, nine hundred ninety-nine".