221323209995 has 4 divisors (see below), whose sum is σ = 265587852000. Its totient is φ = 177058567992.

The previous prime is 221323209953. The next prime is 221323210021. The reversal of 221323209995 is 599902323122.

221323209995 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 221323209995 - 2¹⁸ = 221322947851 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22132320995 + ... + 22132321004.

It is an arithmetic number, because the mean of its divisors is an integer number (66396963000).

Almost surely, 2^221323209995 is an apocalyptic number.

221323209995 is a deficient number, since it is larger than the sum of its proper divisors (44264642005).

221323209995 is an equidigital number, since it uses as much as digits as its factorization.

221323209995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44264642004.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 221323209995 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred nine thousand, nine hundred ninety-five".