3316221421 has 2 divisors, whose sum is σ = 3316221422. Its totient is φ = 3316221420.

The previous prime is 3316221299. The next prime is 3316221431. The reversal of 3316221421 is 1241226133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1733056900 + 1583164521 = 41630^2 + 39789^2 .

It is a cyclic number.

It is not a de Polignac number, because 3316221421 - 2⁹ = 3316220909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3316221431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1658110710 + 1658110711.

It is an arithmetic number, because the mean of its divisors is an integer number (1658110711).

Almost surely, 2^3316221421 is an apocalyptic number.

It is an amenable number.

3316221421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3316221421 is an equidigital number, since it uses as much as digits as its factorization.

3316221421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3316221421 is about 57586.6427307583. The cubic root of 3316221421 is about 1491.2410153831.

Adding to 3316221421 its reverse (1241226133), we get a palindrome (4557447554).

The spelling of 3316221421 in words is "three billion, three hundred sixteen million, two hundred twenty-one thousand, four hundred twenty-one".