381120211 has 4 divisors (see below), whose sum is σ = 383323392. Its totient is φ = 378917032.

The previous prime is 381120203. The next prime is 381120217. The reversal of 381120211 is 112021183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381120211 - 2³ = 381120203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381120217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1101331 + ... + 1101676.

It is an arithmetic number, because the mean of its divisors is an integer number (95830848).

Almost surely, 2^381120211 is an apocalyptic number.

381120211 is a deficient number, since it is larger than the sum of its proper divisors (2203181).

381120211 is a wasteful number, since it uses less digits than its factorization.

381120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203180.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 381120211 is about 19522.3003511369. The cubic root of 381120211 is about 725.0266885142.

Adding to 381120211 its reverse (112021183), we get a palindrome (493141394).

The spelling of 381120211 in words is "three hundred eighty-one million, one hundred twenty thousand, two hundred eleven".