221211002120999 has 4 divisors (see below), whose sum is σ = 241321093222920. Its totient is φ = 201100911019080.

The previous prime is 221211002120993. The next prime is 221211002121019. The reversal of 221211002120999 is 999021200112122.

221211002120999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221211002120999 - 2⁸ = 221211002120743 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 (221211002120993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10055045550944 + ... + 10055045550965.

It is an arithmetic number, because the mean of its divisors is an integer number (60330273305730).

Almost surely, 2^{221211002120999} is an apocalyptic number.

221211002120999 is a deficient number, since it is larger than the sum of its proper divisors (20110091101921).

221211002120999 is a wasteful number, since it uses less digits than its factorization.

221211002120999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20110091101920.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 221211002120999 in words is "two hundred twenty-one trillion, two hundred eleven billion, two million, one hundred twenty thousand, nine hundred ninety-nine".