221101121999 has 8 divisors (see below), whose sum is σ = 225308500560. Its totient is φ = 216895064256.

The previous prime is 221101121981. The next prime is 221101122017. The reversal of 221101121999 is 999121101122.

It is an interprime number because it is at equal distance from previous prime (221101121981) and next prime (221101122017).

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 221101121999 - 2²⁴ = 221084344783 is a prime.

It is a super-2 number, since 2×221101121999² (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 (221101121929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11099 + ... + 665075.

It is an arithmetic number, because the mean of its divisors is an integer number (28163562570).

Almost surely, 2^221101121999 is an apocalyptic number.

221101121999 is a deficient number, since it is larger than the sum of its proper divisors (4207378561).

221101121999 is an equidigital number, since it uses as much as digits as its factorization.

221101121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660409.

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

The spelling of 221101121999 in words is "two hundred twenty-one billion, one hundred one million, one hundred twenty-one thousand, nine hundred ninety-nine".