402243243121 has 2 divisors, whose sum is σ = 402243243122. Its totient is φ = 402243243120.

The previous prime is 402243243119. The next prime is 402243243163. The reversal of 402243243121 is 121342342204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400670010225 + 1573232896 = 632985^2 + 39664^2 .

It is a cyclic number.

It is not a de Polignac number, because 402243243121 - 2¹ = 402243243119 is a prime.

Together with 402243243119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 402243243121.

It is not a weakly prime, because it can be changed into another prime (402243243191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201121621560 + 201121621561.

It is an arithmetic number, because the mean of its divisors is an integer number (201121621561).

Almost surely, 2^402243243121 is an apocalyptic number.

It is an amenable number.

402243243121 is a deficient number, since it is larger than the sum of its proper divisors (1).

402243243121 is an equidigital number, since it uses as much as digits as its factorization.

402243243121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 402243243121 its reverse (121342342204), we get a palindrome (523585585325).

The spelling of 402243243121 in words is "four hundred two billion, two hundred forty-three million, two hundred forty-three thousand, one hundred twenty-one".