402224021321 has 16 divisors (see below), whose sum is σ = 424600704000. Its totient is φ = 380271133968.

The previous prime is 402224021317. The next prime is 402224021359. The reversal of 402224021321 is 123120422204.

It is a cyclic number.

It is not a de Polignac number, because 402224021321 - 2² = 402224021317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402224021371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 894230 + ... + 1266528.

It is an arithmetic number, because the mean of its divisors is an integer number (26537544000).

Almost surely, 2^402224021321 is an apocalyptic number.

It is an amenable number.

402224021321 is a deficient number, since it is larger than the sum of its proper divisors (22376682679).

402224021321 is a wasteful number, since it uses less digits than its factorization.

402224021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372868.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 402224021321 its reverse (123120422204), we get a palindrome (525344443525).

The spelling of 402224021321 in words is "four hundred two billion, two hundred twenty-four million, twenty-one thousand, three hundred twenty-one".