3240044213221 has 2 divisors, whose sum is σ = 3240044213222. Its totient is φ = 3240044213220.

The previous prime is 3240044213201. The next prime is 3240044213279. The reversal of 3240044213221 is 1223124400423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2198144272996 + 1041899940225 = 1482614^2 + 1020735^2 .

It is a cyclic number.

It is not a de Polignac number, because 3240044213221 - 2²⁷ = 3239909995493 is a prime.

It is a super-2 number, since 2×3240044213221² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3240044213221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3240044213201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1620022106610 + 1620022106611.

It is an arithmetic number, because the mean of its divisors is an integer number (1620022106611).

Almost surely, 2^{3240044213221} is an apocalyptic number.

It is an amenable number.

3240044213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3240044213221 is an equidigital number, since it uses as much as digits as its factorization.

3240044213221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 3240044213221 its reverse (1223124400423), we get a palindrome (4463168613644).

The spelling of 3240044213221 in words is "three trillion, two hundred forty billion, forty-four million, two hundred thirteen thousand, two hundred twenty-one".