2212211202221 has 4 divisors (see below), whose sum is σ = 2212834890912. Its totient is φ = 2211587513532.

The previous prime is 2212211202217. The next prime is 2212211202281. The reversal of 2212211202221 is 1222021122122.

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 2212211202221 - 2² = 2212211202217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212211202193 and 2212211202202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212211202281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311839025 + ... + 311846118.

It is an arithmetic number, because the mean of its divisors is an integer number (553208722728).

Almost surely, 2^{2212211202221} is an apocalyptic number.

It is an amenable number.

2212211202221 is a deficient number, since it is larger than the sum of its proper divisors (623688691).

2212211202221 is an equidigital number, since it uses as much as digits as its factorization.

2212211202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623688690.

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

Adding to 2212211202221 its reverse (1222021122122), we get a palindrome (3434232324343).

The spelling of 2212211202221 in words is "two trillion, two hundred twelve billion, two hundred eleven million, two hundred two thousand, two hundred twenty-one".