3321431221 has 2 divisors, whose sum is σ = 3321431222. Its totient is φ = 3321431220.

The previous prime is 3321431213. The next prime is 3321431231. The reversal of 3321431221 is 1221341233.

3321431221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2727972900 + 593458321 = 52230^2 + 24361^2 .

It is a cyclic number.

It is not a de Polignac number, because 3321431221 - 2³ = 3321431213 is a prime.

It is a super-2 number, since 2×3321431221² = 22063810711667101682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3321431192 and 3321431201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3321431231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660715610 + 1660715611.

It is an arithmetic number, because the mean of its divisors is an integer number (1660715611).

Almost surely, 2^3321431221 is an apocalyptic number.

It is an amenable number.

3321431221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3321431221 is an equidigital number, since it uses as much as digits as its factorization.

3321431221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 3321431221 is about 57631.8594268830. The cubic root of 3321431221 is about 1492.0215224310.

Adding to 3321431221 its reverse (1221341233), we get a palindrome (4542772454).

The spelling of 3321431221 in words is "three billion, three hundred twenty-one million, four hundred thirty-one thousand, two hundred twenty-one".