2210211222221 has 4 divisors (see below), whose sum is σ = 2227083063744. Its totient is φ = 2193339380700.

The previous prime is 2210211222217. The next prime is 2210211222257. The reversal of 2210211222221 is 1222221120122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2210211222221 - 2² = 2210211222217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210211222193 and 2210211222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210211222281) 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, 8435920565 + ... + 8435920826.

It is an arithmetic number, because the mean of its divisors is an integer number (556770765936).

Almost surely, 2^{2210211222221} is an apocalyptic number.

It is an amenable number.

2210211222221 is a deficient number, since it is larger than the sum of its proper divisors (16871841523).

2210211222221 is a wasteful number, since it uses less digits than its factorization.

2210211222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16871841522.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2210211222221 its reverse (1222221120122), we get a palindrome (3432432342343).

The spelling of 2210211222221 in words is "two trillion, two hundred ten billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".