321013043340421 has 2 divisors, whose sum is σ = 321013043340422. Its totient is φ = 321013043340420.

The previous prime is 321013043340389. The next prime is 321013043340427. The reversal of 321013043340421 is 124043340310123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176334124995396 + 144678918345025 = 13279086^2 + 12028255^2 .

It is a cyclic number.

It is not a de Polignac number, because 321013043340421 - 2⁵ = 321013043340389 is a prime.

It is a super-2 number, since 2×321013043340421² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321013043340427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160506521670210 + 160506521670211.

It is an arithmetic number, because the mean of its divisors is an integer number (160506521670211).

Almost surely, 2^{321013043340421} is an apocalyptic number.

It is an amenable number.

321013043340421 is a deficient number, since it is larger than the sum of its proper divisors (1).

321013043340421 is an equidigital number, since it uses as much as digits as its factorization.

321013043340421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 321013043340421 its reverse (124043340310123), we get a palindrome (445056383650544).

The spelling of 321013043340421 in words is "three hundred twenty-one trillion, thirteen billion, forty-three million, three hundred forty thousand, four hundred twenty-one".