2212213023221 has 4 divisors (see below), whose sum is σ = 2222697445344. Its totient is φ = 2201728601100.

The previous prime is 2212213023217. The next prime is 2212213023247. The reversal of 2212213023221 is 1223203122122.

It is a happy number.

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 2212213023221 - 2² = 2212213023217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212213023281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5242210745 + ... + 5242211166.

It is an arithmetic number, because the mean of its divisors is an integer number (555674361336).

Almost surely, 2^{2212213023221} is an apocalyptic number.

It is an amenable number.

2212213023221 is a deficient number, since it is larger than the sum of its proper divisors (10484422123).

2212213023221 is a wasteful number, since it uses less digits than its factorization.

2212213023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10484422122.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2212213023221 its reverse (1223203122122), we get a palindrome (3435416145343).

The spelling of 2212213023221 in words is "two trillion, two hundred twelve billion, two hundred thirteen million, twenty-three thousand, two hundred twenty-one".