21002222220999 has 8 divisors (see below), whose sum is σ = 28003071957120. Its totient is φ = 14001426982776.

The previous prime is 21002222220953. The next prime is 21002222221009. The reversal of 21002222220999 is 99902222220012.

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

It is not a de Polignac number, because 21002222220999 - 2⁷ = 21002222220871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21002222220999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002222221999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12716619 + ... + 14272940.

It is an arithmetic number, because the mean of its divisors is an integer number (3500383994640).

Almost surely, 2^{21002222220999} is an apocalyptic number.

21002222220999 is a deficient number, since it is larger than the sum of its proper divisors (7000849736121).

21002222220999 is a wasteful number, since it uses less digits than its factorization.

21002222220999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27248949.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 21002222220999 in words is "twenty-one trillion, two billion, two hundred twenty-two million, two hundred twenty thousand, nine hundred ninety-nine".