402320243221 has 8 divisors (see below), whose sum is σ = 436384991840. Its totient is φ = 368700785712.

The previous prime is 402320243167. The next prime is 402320243231. The reversal of 402320243221 is 122342023204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402320243221 - 2⁷ = 402320243093 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 (402320243231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111320895 + ... + 111324508.

It is an arithmetic number, because the mean of its divisors is an integer number (54548123980).

Almost surely, 2^402320243221 is an apocalyptic number.

It is an amenable number.

402320243221 is a deficient number, since it is larger than the sum of its proper divisors (34064748619).

402320243221 is a wasteful number, since it uses less digits than its factorization.

402320243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222645555.

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

Adding to 402320243221 its reverse (122342023204), we get a palindrome (524662266425).

The spelling of 402320243221 in words is "four hundred two billion, three hundred twenty million, two hundred forty-three thousand, two hundred twenty-one".