321426121 has 2 divisors, whose sum is σ = 321426122. Its totient is φ = 321426120.

The previous prime is 321426109. The next prime is 321426139. The reversal of 321426121 is 121624123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211993600 + 109432521 = 14560^2 + 10461^2 .

It is an emirp because it is prime and its reverse (121624123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321426121 - 2²⁷ = 187208393 is a prime.

It is a super-2 number, since 2×321426121² = 206629502522213282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321426092 and 321426101.

It is not a weakly prime, because it can be changed into another prime (321426151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160713060 + 160713061.

It is an arithmetic number, because the mean of its divisors is an integer number (160713061).

Almost surely, 2^321426121 is an apocalyptic number.

It is an amenable number.

321426121 is a deficient number, since it is larger than the sum of its proper divisors (1).

321426121 is an equidigital number, since it uses as much as digits as its factorization.

321426121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 321426121 is about 17928.3608006979. The cubic root of 321426121 is about 685.0049698611.

The spelling of 321426121 in words is "three hundred twenty-one million, four hundred twenty-six thousand, one hundred twenty-one".