321112213421 has 2 divisors, whose sum is σ = 321112213422. Its totient is φ = 321112213420.

The previous prime is 321112213403. The next prime is 321112213439. The reversal of 321112213421 is 124312211123.

It is a balanced prime because it is at equal distance from previous prime (321112213403) and next prime (321112213439).

It can be written as a sum of positive squares in only one way, i.e., 309547576900 + 11564636521 = 556370^2 + 107539^2 .

It is a cyclic number.

It is not a de Polignac number, because 321112213421 - 2³⁴ = 303932344237 is a prime.

It is a super-2 number, since 2×321112213421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321112213021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160556106710 + 160556106711.

It is an arithmetic number, because the mean of its divisors is an integer number (160556106711).

Almost surely, 2^321112213421 is an apocalyptic number.

It is an amenable number.

321112213421 is a deficient number, since it is larger than the sum of its proper divisors (1).

321112213421 is an equidigital number, since it uses as much as digits as its factorization.

321112213421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

Adding to 321112213421 its reverse (124312211123), we get a palindrome (445424424544).

The spelling of 321112213421 in words is "three hundred twenty-one billion, one hundred twelve million, two hundred thirteen thousand, four hundred twenty-one".