402123221323 has 4 divisors (see below), whose sum is σ = 409710451968. Its totient is φ = 394535990680.

The previous prime is 402123221317. The next prime is 402123221399. The reversal of 402123221323 is 323122321204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402123221323 - 2¹⁷ = 402123090251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402123221923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3793615243 + ... + 3793615348.

It is an arithmetic number, because the mean of its divisors is an integer number (102427612992).

Almost surely, 2^402123221323 is an apocalyptic number.

402123221323 is a deficient number, since it is larger than the sum of its proper divisors (7587230645).

402123221323 is an equidigital number, since it uses as much as digits as its factorization.

402123221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7587230644.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 402123221323 its reverse (323122321204), we get a palindrome (725245542527).

The spelling of 402123221323 in words is "four hundred two billion, one hundred twenty-three million, two hundred twenty-one thousand, three hundred twenty-three".