402220442321 has 4 divisors (see below), whose sum is σ = 402462308352. Its totient is φ = 401978576292.

The previous prime is 402220442279. The next prime is 402220442353. The reversal of 402220442321 is 123244022204.

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 a cyclic number.

It is not a de Polignac number, because 402220442321 - 2¹⁰ = 402220441297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402220442021) 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, 120930521 + ... + 120933846.

It is an arithmetic number, because the mean of its divisors is an integer number (100615577088).

Almost surely, 2^402220442321 is an apocalyptic number.

It is an amenable number.

402220442321 is a deficient number, since it is larger than the sum of its proper divisors (241866031).

402220442321 is a wasteful number, since it uses less digits than its factorization.

402220442321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241866030.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 402220442321 its reverse (123244022204), we get a palindrome (525464464525).

The spelling of 402220442321 in words is "four hundred two billion, two hundred twenty million, four hundred forty-two thousand, three hundred twenty-one".