221210201999 has 8 divisors (see below), whose sum is σ = 222035486400. Its totient is φ = 220385110176.

The previous prime is 221210201969. The next prime is 221210202001. The reversal of 221210201999 is 999102012122.

It is a happy number.

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 221210201999 - 2¹⁶ = 221210136463 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 (221210201909) 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, 2504717 + ... + 2591529.

It is an arithmetic number, because the mean of its divisors is an integer number (27754435800).

Almost surely, 2^221210201999 is an apocalyptic number.

221210201999 is a deficient number, since it is larger than the sum of its proper divisors (825284401).

221210201999 is an equidigital number, since it uses as much as digits as its factorization.

221210201999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96289.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 221210201999 in words is "two hundred twenty-one billion, two hundred ten million, two hundred one thousand, nine hundred ninety-nine".