381121101 has 12 divisors (see below), whose sum is σ = 558050428. Its totient is φ = 250599744.

The previous prime is 381121087. The next prime is 381121141. The reversal of 381121101 is 101121183.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 172896201 + 208224900 = 13149^2 + 14430^2 .

It is not a de Polignac number, because 381121101 - 2²⁵ = 347566669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381121141) 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 11 ways as a sum of consecutive naturals, for example, 289390 + ... + 290703.

Almost surely, 2^381121101 is an apocalyptic number.

It is an amenable number.

381121101 is a deficient number, since it is larger than the sum of its proper divisors (176929327).

381121101 is a wasteful number, since it uses less digits than its factorization.

381121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580172 (or 580169 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 381121101 is about 19522.3231455685. The cubic root of 381121101 is about 725.0272528796.

Adding to 381121101 its reverse (101121183), we get a palindrome (482242284).

The spelling of 381121101 in words is "three hundred eighty-one million, one hundred twenty-one thousand, one hundred one".