382821121 has 2 divisors, whose sum is σ = 382821122. Its totient is φ = 382821120.

The previous prime is 382821119. The next prime is 382821133. The reversal of 382821121 is 121128283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369600625 + 13220496 = 19225^2 + 3636^2 .

It is an emirp because it is prime and its reverse (121128283) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 382821121 - 2¹ = 382821119 is a prime.

Together with 382821119, 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 382821121.

It is not a weakly prime, because it can be changed into another prime (382821161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191410560 + 191410561.

It is an arithmetic number, because the mean of its divisors is an integer number (191410561).

Almost surely, 2^382821121 is an apocalyptic number.

It is an amenable number.

382821121 is a deficient number, since it is larger than the sum of its proper divisors (1).

382821121 is an equidigital number, since it uses as much as digits as its factorization.

382821121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 28.

The square root of 382821121 is about 19565.8151120775. The cubic root of 382821121 is about 726.1036672713.

The spelling of 382821121 in words is "three hundred eighty-two million, eight hundred twenty-one thousand, one hundred twenty-one".