381000121 has 4 divisors (see below), whose sum is σ = 381884544. Its totient is φ = 380115700.

The previous prime is 381000119. The next prime is 381000131. The reversal of 381000121 is 121000183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 381000121 - 2¹ = 381000119 is a prime.

It is a super-2 number, since 2×381000121² = 290322184404029282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381000095 and 381000104.

It is not an unprimeable number, because it can be changed into a prime (381000131) 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 in 3 ways as a sum of consecutive naturals, for example, 441565 + ... + 442426.

It is an arithmetic number, because the mean of its divisors is an integer number (95471136).

Almost surely, 2^381000121 is an apocalyptic number.

It is an amenable number.

381000121 is a deficient number, since it is larger than the sum of its proper divisors (884423).

381000121 is an equidigital number, since it uses as much as digits as its factorization.

381000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884422.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 381000121 is about 19519.2243954518. The cubic root of 381000121 is about 724.9505291650.

The spelling of 381000121 in words is "three hundred eighty-one million, one hundred twenty-one", and thus it is an aban number.