221323020199 has 4 divisors (see below), whose sum is σ = 221388329880. Its totient is φ = 221257710520.

The previous prime is 221323020197. The next prime is 221323020203. The reversal of 221323020199 is 991020323122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991020323122 = 2 ⋅495510161561.

It is a cyclic number.

It is not a de Polignac number, because 221323020199 - 2¹ = 221323020197 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 (221323020197) 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, 32649757 + ... + 32656534.

It is an arithmetic number, because the mean of its divisors is an integer number (55347082470).

Almost surely, 2^221323020199 is an apocalyptic number.

221323020199 is a deficient number, since it is larger than the sum of its proper divisors (65309681).

221323020199 is an equidigital number, since it uses as much as digits as its factorization.

221323020199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65309680.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 221323020199 in words is "two hundred twenty-one billion, three hundred twenty-three million, twenty thousand, one hundred ninety-nine".