2213331212221 has 4 divisors (see below), whose sum is σ = 2213363588832. Its totient is φ = 2213298835612.

The previous prime is 2213331212219. The next prime is 2213331212263. The reversal of 2213331212221 is 1222121333122.

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 2213331212221 - 2¹ = 2213331212219 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 (2213331212321) 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, 16085545 + ... + 16222558.

It is an arithmetic number, because the mean of its divisors is an integer number (553340897208).

Almost surely, 2^{2213331212221} is an apocalyptic number.

It is an amenable number.

2213331212221 is a deficient number, since it is larger than the sum of its proper divisors (32376611).

2213331212221 is an equidigital number, since it uses as much as digits as its factorization.

2213331212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32376610.

The product of its digits is 1728, while the sum is 25.

Adding to 2213331212221 its reverse (1222121333122), we get a palindrome (3435452545343).

The spelling of 2213331212221 in words is "two trillion, two hundred thirteen billion, three hundred thirty-one million, two hundred twelve thousand, two hundred twenty-one".