40302131321 has 2 divisors, whose sum is σ = 40302131322. Its totient is φ = 40302131320.

The previous prime is 40302131279. The next prime is 40302131323. The reversal of 40302131321 is 12313120304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33534765625 + 6767365696 = 183125^2 + 82264^2 .

It is a cyclic number.

It is not a de Polignac number, because 40302131321 - 2¹⁸ = 40301869177 is a prime.

Together with 40302131323, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40302131293 and 40302131302.

It is not a weakly prime, because it can be changed into another prime (40302131323) 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, 20151065660 + 20151065661.

It is an arithmetic number, because the mean of its divisors is an integer number (20151065661).

Almost surely, 2^40302131321 is an apocalyptic number.

It is an amenable number.

40302131321 is a deficient number, since it is larger than the sum of its proper divisors (1).

40302131321 is an equidigital number, since it uses as much as digits as its factorization.

40302131321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 40302131321 its reverse (12313120304), we get a palindrome (52615251625).

The spelling of 40302131321 in words is "forty billion, three hundred two million, one hundred thirty-one thousand, three hundred twenty-one".