402334331021 has 8 divisors (see below), whose sum is σ = 459831077760. Its totient is φ = 344842687728.

The previous prime is 402334330973. The next prime is 402334331041. The reversal of 402334331021 is 120133433204.

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

It is a de Polignac number, because none of the positive numbers 2^k-402334331021 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 (402334331041) 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 in 7 ways as a sum of consecutive naturals, for example, 1105406 + ... + 1423583.

It is an arithmetic number, because the mean of its divisors is an integer number (57478884720).

Almost surely, 2^402334331021 is an apocalyptic number.

It is an amenable number.

402334331021 is a deficient number, since it is larger than the sum of its proper divisors (57496746739).

402334331021 is a wasteful number, since it uses less digits than its factorization.

402334331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551723.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 402334331021 its reverse (120133433204), we get a palindrome (522467764225).

The spelling of 402334331021 in words is "four hundred two billion, three hundred thirty-four million, three hundred thirty-one thousand, twenty-one".