330431211213421 has 2 divisors, whose sum is σ = 330431211213422. Its totient is φ = 330431211213420.

The previous prime is 330431211213419. The next prime is 330431211213451. The reversal of 330431211213421 is 124312112134033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277175515690921 + 53255695522500 = 16648589^2 + 7297650^2 .

It is an emirp because it is prime and its reverse (124312112134033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 330431211213421 - 2¹ = 330431211213419 is a prime.

It is a super-2 number, since 2×330431211213421² (a number of 30 digits) contains 22 as substring.

Together with 330431211213419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (330431211213401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165215605606710 + 165215605606711.

It is an arithmetic number, because the mean of its divisors is an integer number (165215605606711).

Almost surely, 2^{330431211213421} is an apocalyptic number.

It is an amenable number.

330431211213421 is a deficient number, since it is larger than the sum of its proper divisors (1).

330431211213421 is an equidigital number, since it uses as much as digits as its factorization.

330431211213421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 330431211213421 its reverse (124312112134033), we get a palindrome (454743323347454).

The spelling of 330431211213421 in words is "three hundred thirty trillion, four hundred thirty-one billion, two hundred eleven million, two hundred thirteen thousand, four hundred twenty-one".