21202211220211 has 8 divisors (see below), whose sum is σ = 24537821304320. Its totient is φ = 17943281827848.

The previous prime is 21202211220209. The next prime is 21202211220241. The reversal of 21202211220211 is 11202211220212.

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 21202211220211 - 2¹ = 21202211220209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202211220241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19170172341 + ... + 19170173446.

It is an arithmetic number, because the mean of its divisors is an integer number (3067227663040).

Almost surely, 2^{21202211220211} is an apocalyptic number.

21202211220211 is a deficient number, since it is larger than the sum of its proper divisors (3335610084109).

21202211220211 is an equidigital number, since it uses as much as digits as its factorization.

21202211220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38340345873.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21202211220211 its reverse (11202211220212), we get a palindrome (32404422440423).

Subtracting from 21202211220211 its reverse (11202211220212), we obtain a palindrome (9999999999999).

The spelling of 21202211220211 in words is "twenty-one trillion, two hundred two billion, two hundred eleven million, two hundred twenty thousand, two hundred eleven".