321121139 has 2 divisors, whose sum is σ = 321121140. Its totient is φ = 321121138.

The previous prime is 321121103. The next prime is 321121169. The reversal of 321121139 is 931121123.

It is a strong prime.

It is an emirp because it is prime and its reverse (931121123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321121139 - 2²⁸ = 52685683 is a prime.

It is not a weakly prime, because it can be changed into another prime (321121169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160560569 + 160560570.

It is an arithmetic number, because the mean of its divisors is an integer number (160560570).

Almost surely, 2^321121139 is an apocalyptic number.

321121139 is a deficient number, since it is larger than the sum of its proper divisors (1).

321121139 is an equidigital number, since it uses as much as digits as its factorization.

321121139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 23.

The square root of 321121139 is about 17919.8532081041. The cubic root of 321121139 is about 684.7882479020.

The spelling of 321121139 in words is "three hundred twenty-one million, one hundred twenty-one thousand, one hundred thirty-nine".