3212613221 has 2 divisors, whose sum is σ = 3212613222. Its totient is φ = 3212613220.

The previous prime is 3212613211. The next prime is 3212613247. The reversal of 3212613221 is 1223162123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2874568225 + 338044996 = 53615^2 + 18386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3212613221 - 2¹⁴ = 3212596837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3212613211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606306610 + 1606306611.

It is an arithmetic number, because the mean of its divisors is an integer number (1606306611).

Almost surely, 2^3212613221 is an apocalyptic number.

It is an amenable number.

3212613221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3212613221 is an equidigital number, since it uses as much as digits as its factorization.

3212613221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 3212613221 is about 56679.9190278180. The cubic root of 3212613221 is about 1475.5462071317.

Adding to 3212613221 its reverse (1223162123), we get a palindrome (4435775344).

The spelling of 3212613221 in words is "three billion, two hundred twelve million, six hundred thirteen thousand, two hundred twenty-one".