402421423331 has 2 divisors, whose sum is σ = 402421423332. Its totient is φ = 402421423330.

The previous prime is 402421423319. The next prime is 402421423337. The reversal of 402421423331 is 133324124204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402421423331 is a prime.

It is a super-2 number, since 2×402421423331² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402421423294 and 402421423303.

It is not a weakly prime, because it can be changed into another prime (402421423337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201210711665 + 201210711666.

It is an arithmetic number, because the mean of its divisors is an integer number (201210711666).

Almost surely, 2^402421423331 is an apocalyptic number.

402421423331 is a deficient number, since it is larger than the sum of its proper divisors (1).

402421423331 is an equidigital number, since it uses as much as digits as its factorization.

402421423331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 402421423331 its reverse (133324124204), we get a palindrome (535745547535).

The spelling of 402421423331 in words is "four hundred two billion, four hundred twenty-one million, four hundred twenty-three thousand, three hundred thirty-one".