402202012321 has 2 divisors, whose sum is σ = 402202012322. Its totient is φ = 402202012320.

The previous prime is 402202012319. The next prime is 402202012363. The reversal of 402202012321 is 123210202204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351691697296 + 50510315025 = 593036^2 + 224745^2 .

It is a cyclic number.

It is not a de Polignac number, because 402202012321 - 2¹ = 402202012319 is a prime.

Together with 402202012319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (402202012021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201101006160 + 201101006161.

It is an arithmetic number, because the mean of its divisors is an integer number (201101006161).

Almost surely, 2^402202012321 is an apocalyptic number.

It is an amenable number.

402202012321 is a deficient number, since it is larger than the sum of its proper divisors (1).

402202012321 is an equidigital number, since it uses as much as digits as its factorization.

402202012321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 402202012321 its reverse (123210202204), we get a palindrome (525412214525).

The spelling of 402202012321 in words is "four hundred two billion, two hundred two million, twelve thousand, three hundred twenty-one".