3213400211221 has 2 divisors, whose sum is σ = 3213400211222. Its totient is φ = 3213400211220.

The previous prime is 3213400211201. The next prime is 3213400211317. The reversal of 3213400211221 is 1221120043123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3075425108721 + 137975102500 = 1753689^2 + 371450^2 .

It is a cyclic number.

It is not a de Polignac number, because 3213400211221 - 2¹³ = 3213400203029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3213400211192 and 3213400211201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3213400211201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606700105610 + 1606700105611.

It is an arithmetic number, because the mean of its divisors is an integer number (1606700105611).

Almost surely, 2^{3213400211221} is an apocalyptic number.

It is an amenable number.

3213400211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3213400211221 is an equidigital number, since it uses as much as digits as its factorization.

3213400211221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 3213400211221 its reverse (1221120043123), we get a palindrome (4434520254344).

The spelling of 3213400211221 in words is "three trillion, two hundred thirteen billion, four hundred million, two hundred eleven thousand, two hundred twenty-one".