21220112220999 has 8 divisors (see below), whose sum is σ = 28293504903552. Its totient is φ = 14146730509560.

The previous prime is 21220112220977. The next prime is 21220112221003. The reversal of 21220112220999 is 99902221102212.

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

It is not a de Polignac number, because 21220112220999 - 2⁸ = 21220112220743 is a prime.

It is a super-2 number, since 2×21220112220999² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21220112220999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220112220949) 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, 4510494 + ... + 7923684.

It is an arithmetic number, because the mean of its divisors is an integer number (3536688112944).

Almost surely, 2^{21220112220999} is an apocalyptic number.

21220112220999 is a deficient number, since it is larger than the sum of its proper divisors (7073392682553).

21220112220999 is a wasteful number, since it uses less digits than its factorization.

21220112220999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5485557.

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 21220112220999 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, two hundred twenty thousand, nine hundred ninety-nine".