2221331213 has 2 divisors, whose sum is σ = 2221331214. Its totient is φ = 2221331212.

The previous prime is 2221331159. The next prime is 2221331239. The reversal of 2221331213 is 3121331222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1406400004 + 814931209 = 37502^2 + 28547^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221331213 - 2⁸ = 2221330957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221331293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110665606 + 1110665607.

It is an arithmetic number, because the mean of its divisors is an integer number (1110665607).

Almost surely, 2^2221331213 is an apocalyptic number.

It is an amenable number.

2221331213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221331213 is an equidigital number, since it uses as much as digits as its factorization.

2221331213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 2221331213 is about 47131.0005516539. Note that the first 3 decimals coincide. The cubic root of 2221331213 is about 1304.7814479158.

Adding to 2221331213 its reverse (3121331222), we get a palindrome (5342662435).

Subtracting 2221331213 from its reverse (3121331222), we obtain a palindrome (900000009).

The spelling of 2221331213 in words is "two billion, two hundred twenty-one million, three hundred thirty-one thousand, two hundred thirteen".