401821310843 has 2 divisors, whose sum is σ = 401821310844. Its totient is φ = 401821310842.

The previous prime is 401821310809. The next prime is 401821310861. The reversal of 401821310843 is 348013128104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401821310843 - 2³⁴ = 384641441659 is a prime.

It is a super-2 number, since 2×401821310843² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401821313843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200910655421 + 200910655422.

It is an arithmetic number, because the mean of its divisors is an integer number (200910655422).

Almost surely, 2^401821310843 is an apocalyptic number.

401821310843 is a deficient number, since it is larger than the sum of its proper divisors (1).

401821310843 is an equidigital number, since it uses as much as digits as its factorization.

401821310843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 35.

Adding to 401821310843 its reverse (348013128104), we get a palindrome (749834438947).

The spelling of 401821310843 in words is "four hundred one billion, eight hundred twenty-one million, three hundred ten thousand, eight hundred forty-three".