221010111221999 has 32 divisors (see below), whose sum is σ = 241884603717120. Its totient is φ = 200267298000000.

The previous prime is 221010111221989. The next prime is 221010111222001. The reversal of 221010111221999 is 999122111010122.

It is not a de Polignac number, because 221010111221999 - 2⁸ = 221010111221743 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 (221010111221959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33390253712 + ... + 33390260330.

It is an arithmetic number, because the mean of its divisors is an integer number (7558893866160).

Almost surely, 2^{221010111221999} is an apocalyptic number.

221010111221999 is a deficient number, since it is larger than the sum of its proper divisors (20874492495121).

221010111221999 is a wasteful number, since it uses less digits than its factorization.

221010111221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14543.

The product of its (nonzero) digits is 11664, while the sum is 41.

The spelling of 221010111221999 in words is "two hundred twenty-one trillion, ten billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred ninety-nine".