321213421031 has 2 divisors, whose sum is σ = 321213421032. Its totient is φ = 321213421030.

The previous prime is 321213420961. The next prime is 321213421063. The reversal of 321213421031 is 130124312123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321213421031 - 2¹⁴ = 321213404647 is a prime.

It is a super-2 number, since 2×321213421031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321213420988 and 321213421006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321213423031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160606710515 + 160606710516.

It is an arithmetic number, because the mean of its divisors is an integer number (160606710516).

Almost surely, 2^321213421031 is an apocalyptic number.

321213421031 is a deficient number, since it is larger than the sum of its proper divisors (1).

321213421031 is an equidigital number, since it uses as much as digits as its factorization.

321213421031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 321213421031 its reverse (130124312123), we get a palindrome (451337733154).

The spelling of 321213421031 in words is "three hundred twenty-one billion, two hundred thirteen million, four hundred twenty-one thousand, thirty-one".