321402113 has 2 divisors, whose sum is σ = 321402114. Its totient is φ = 321402112.

The previous prime is 321402097. The next prime is 321402131. The reversal of 321402113 is 311204123.

Together with next prime (321402131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300398224 + 21003889 = 17332^2 + 4583^2 .

It is an emirp because it is prime and its reverse (311204123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321402113 - 2⁴ = 321402097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321402091 and 321402100.

It is not a weakly prime, because it can be changed into another prime (321402013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160701056 + 160701057.

It is an arithmetic number, because the mean of its divisors is an integer number (160701057).

Almost surely, 2^321402113 is an apocalyptic number.

It is an amenable number.

321402113 is a deficient number, since it is larger than the sum of its proper divisors (1).

321402113 is an equidigital number, since it uses as much as digits as its factorization.

321402113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 321402113 is about 17927.6912345120. The cubic root of 321402113 is about 684.9879146109.

Adding to 321402113 its reverse (311204123), we get a palindrome (632606236).

The spelling of 321402113 in words is "three hundred twenty-one million, four hundred two thousand, one hundred thirteen".