222121221120999 has 48 divisors (see below), whose sum is σ = 324244323250848. Its totient is φ = 146512476000000.

The previous prime is 222121221120989. The next prime is 222121221121001. The reversal of 222121221120999 is 999021122121222.

222121221120999 is a `hidden beast` number, since 2 + 2 + 212 + 1 + 221 + 1 + 209 + 9 + 9 = 666.

It is not a de Polignac number, because 222121221120999 - 2¹⁹ = 222121220596711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121221120989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17379010989 + ... + 17379023769.

It is an arithmetic number, because the mean of its divisors is an integer number (6755090067726).

Almost surely, 2^{222121221120999} is an apocalyptic number.

222121221120999 is a deficient number, since it is larger than the sum of its proper divisors (102123102129849).

222121221120999 is a wasteful number, since it uses less digits than its factorization.

222121221120999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24720 (or 24717 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 222121221120999 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, nine hundred ninety-nine".