22021212109999 has 4 divisors (see below), whose sum is σ = 22322872549936. Its totient is φ = 21719551670064.

The previous prime is 22021212109957. The next prime is 22021212110003. The reversal of 22021212109999 is 99990121212022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22021212109999 - 2²⁵ = 22021178555567 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 (22021212109199) 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 3 ways as a sum of consecutive naturals, for example, 150830219859 + ... + 150830220004.

It is an arithmetic number, because the mean of its divisors is an integer number (5580718137484).

Almost surely, 2^{22021212109999} is an apocalyptic number.

22021212109999 is a deficient number, since it is larger than the sum of its proper divisors (301660439937).

22021212109999 is an equidigital number, since it uses as much as digits as its factorization.

22021212109999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301660439936.

The product of its (nonzero) digits is 209952, while the sum is 49.

The spelling of 22021212109999 in words is "twenty-two trillion, twenty-one billion, two hundred twelve million, one hundred nine thousand, nine hundred ninety-nine".