221111111002211 has 4 divisors (see below), whose sum is σ = 221113386209352. Its totient is φ = 221108835795072.

The previous prime is 221111111002163. The next prime is 221111111002241. The reversal of 221111111002211 is 112200111111122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221111111002211 - 2²² = 221111106807907 is a prime.

It is a super-4 number, since 4×221111111002211⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 221111111002211.

It is not an unprimeable number, because it can be changed into a prime (221111111002241) 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, 1137457790 + ... + 1137652163.

It is an arithmetic number, because the mean of its divisors is an integer number (55278346552338).

Almost surely, 2^{221111111002211} is an apocalyptic number.

221111111002211 is a deficient number, since it is larger than the sum of its proper divisors (2275207141).

221111111002211 is an equidigital number, since it uses as much as digits as its factorization.

221111111002211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275207140.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 221111111002211 its reverse (112200111111122), we get a palindrome (333311222113333).

The spelling of 221111111002211 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred eleven million, two thousand, two hundred eleven".