381361121 has 2 divisors, whose sum is σ = 381361122. Its totient is φ = 381361120.

The previous prime is 381361069. The next prime is 381361133. The reversal of 381361121 is 121163183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373880896 + 7480225 = 19336^2 + 2735^2 .

It is an emirp because it is prime and its reverse (121163183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381361121 - 2²² = 377166817 is a prime.

It is a super-2 number, since 2×381361121² = 290872609220753282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381361171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190680560 + 190680561.

It is an arithmetic number, because the mean of its divisors is an integer number (190680561).

Almost surely, 2^381361121 is an apocalyptic number.

It is an amenable number.

381361121 is a deficient number, since it is larger than the sum of its proper divisors (1).

381361121 is an equidigital number, since it uses as much as digits as its factorization.

381361121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 381361121 is about 19528.4694996817. The cubic root of 381361121 is about 725.1794219428.

The spelling of 381361121 in words is "three hundred eighty-one million, three hundred sixty-one thousand, one hundred twenty-one".