402212011321 has 2 divisors, whose sum is σ = 402212011322. Its totient is φ = 402212011320.

The previous prime is 402212011261. The next prime is 402212011349. The reversal of 402212011321 is 123110212204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351424881721 + 50787129600 = 592811^2 + 225360^2 .

It is a cyclic number.

It is not a de Polignac number, because 402212011321 - 2⁷ = 402212011193 is a prime.

It is not a weakly prime, because it can be changed into another prime (402210011321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201106005660 + 201106005661.

It is an arithmetic number, because the mean of its divisors is an integer number (201106005661).

Almost surely, 2^402212011321 is an apocalyptic number.

It is an amenable number.

402212011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

402212011321 is an equidigital number, since it uses as much as digits as its factorization.

402212011321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 402212011321 its reverse (123110212204), we get a palindrome (525322223525).

The spelling of 402212011321 in words is "four hundred two billion, two hundred twelve million, eleven thousand, three hundred twenty-one".