402203423221 has 4 divisors (see below), whose sum is σ = 410760942912. Its totient is φ = 393645903532.

The previous prime is 402203423191. The next prime is 402203423233. The reversal of 402203423221 is 122324302204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 402203423221 - 2²⁷ = 402069205493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402203423021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4278759775 + ... + 4278759868.

It is an arithmetic number, because the mean of its divisors is an integer number (102690235728).

Almost surely, 2^402203423221 is an apocalyptic number.

It is an amenable number.

402203423221 is a deficient number, since it is larger than the sum of its proper divisors (8557519691).

402203423221 is an equidigital number, since it uses as much as digits as its factorization.

402203423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8557519690.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 402203423221 its reverse (122324302204), we get a palindrome (524527725425).

The spelling of 402203423221 in words is "four hundred two billion, two hundred three million, four hundred twenty-three thousand, two hundred twenty-one".