221211101999 has 8 divisors (see below), whose sum is σ = 221476157760. Its totient is φ = 220946203296.

The previous prime is 221211101989. The next prime is 221211102011. The reversal of 221211101999 is 999101112122.

221211101999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221211101999 - 2⁴ = 221211101983 is a prime.

It is a super-2 number, since 2×221211101999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211101989) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2910509 + ... + 2985545.

It is an arithmetic number, because the mean of its divisors is an integer number (27684519720).

Almost surely, 2^221211101999 is an apocalyptic number.

221211101999 is a deficient number, since it is larger than the sum of its proper divisors (265055761).

221211101999 is a wasteful number, since it uses less digits than its factorization.

221211101999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78529.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 221211101999 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred one thousand, nine hundred ninety-nine".