21222211022211 has 8 divisors (see below), whose sum is σ = 28296334337040. Its totient is φ = 14148114194432.

The previous prime is 21222211022209. The next prime is 21222211022213. The reversal of 21222211022211 is 11222011222212.

It is an interprime number because it is at equal distance from previous prime (21222211022209) and next prime (21222211022213).

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 21222211022211 - 2¹ = 21222211022209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222211022213) 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, 4670046 + ... + 8015843.

It is an arithmetic number, because the mean of its divisors is an integer number (3537041792130).

Almost surely, 2^{21222211022211} is an apocalyptic number.

21222211022211 is a deficient number, since it is larger than the sum of its proper divisors (7074123314829).

21222211022211 is a wasteful number, since it uses less digits than its factorization.

21222211022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13243525.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21222211022211 its reverse (11222011222212), we get a palindrome (32444222244423).

The spelling of 21222211022211 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, twenty-two thousand, two hundred eleven".