221312112020999 has 8 divisors (see below), whose sum is σ = 234330612713568. Its totient is φ = 208293627013120.

The previous prime is 221312112020969. The next prime is 221312112021023. The reversal of 221312112020999 is 999020211213122.

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 221312112020999 - 2²⁰ = 221312110972423 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 (221312112020969) 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, 37831334 + ... + 43287804.

It is an arithmetic number, because the mean of its divisors is an integer number (29291326589196).

Almost surely, 2^{221312112020999} is an apocalyptic number.

221312112020999 is a deficient number, since it is larger than the sum of its proper divisors (13018500692569).

221312112020999 is a wasteful number, since it uses less digits than its factorization.

221312112020999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7842345.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 221312112020999 in words is "two hundred twenty-one trillion, three hundred twelve billion, one hundred twelve million, twenty thousand, nine hundred ninety-nine".