1100109381 has 16 divisors (see below), whose sum is σ = 1701379584. Its totient is φ = 619250544.

The previous prime is 1100109379. The next prime is 1100109383. The reversal of 1100109381 is 1839010011.

It is an interprime number because it is at equal distance from previous prime (1100109379) and next prime (1100109383).

It is not a de Polignac number, because 1100109381 - 2¹ = 1100109379 is a prime.

It is a super-2 number, since 2×1100109381² = 2420481300328406322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100109383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389535 + ... + 392348.

It is an arithmetic number, because the mean of its divisors is an integer number (106336224).

Almost surely, 2^1100109381 is an apocalyptic number.

It is an amenable number.

1100109381 is a deficient number, since it is larger than the sum of its proper divisors (601270203).

1100109381 is an equidigital number, since it uses as much as digits as its factorization.

1100109381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781960.

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 1100109381 is about 33167.8968431826. The cubic root of 1100109381 is about 1032.3143300288.

Adding to 1100109381 its reverse (1839010011), we get a palindrome (2939119392).

The spelling of 1100109381 in words is "one billion, one hundred million, one hundred nine thousand, three hundred eighty-one".