321423211331 has 2 divisors, whose sum is σ = 321423211332. Its totient is φ = 321423211330.

The previous prime is 321423211283. The next prime is 321423211363. The reversal of 321423211331 is 133112324123.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321423211331 - 2¹⁰ = 321423210307 is a prime.

It is a super-2 number, since 2×321423211331² (a number of 24 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 321423211331.

It is not a weakly prime, because it can be changed into another prime (321423211381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160711605665 + 160711605666.

It is an arithmetic number, because the mean of its divisors is an integer number (160711605666).

Almost surely, 2^321423211331 is an apocalyptic number.

321423211331 is a deficient number, since it is larger than the sum of its proper divisors (1).

321423211331 is an equidigital number, since it uses as much as digits as its factorization.

321423211331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 26.

Adding to 321423211331 its reverse (133112324123), we get a palindrome (454535535454).

The spelling of 321423211331 in words is "three hundred twenty-one billion, four hundred twenty-three million, two hundred eleven thousand, three hundred thirty-one".