12103091 has 32 divisors (see below), whose sum is σ = 16547328. Its totient is φ = 8547840.

The previous prime is 12103087. The next prime is 12103093. The reversal of 12103091 is 19030121.

12103091 = T₉₈ + T₉₉ + ... + T₄₁₈.

It is a happy number.

It is not a de Polignac number, because 12103091 - 2² = 12103087 is a prime.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (12103093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107051 + ... + 107163.

It is an arithmetic number, because the mean of its divisors is an integer number (517104).

Almost surely, 2^12103091 is an apocalyptic number.

12103091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12103091 is a deficient number, since it is larger than the sum of its proper divisors (4444237).

12103091 is a wasteful number, since it uses less digits than its factorization.

12103091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 12103091 is about 3478.9496978255. The cubic root of 12103091 is about 229.5965896352.

It can be divided in two parts, 121030 and 91, that added together give a palindrome (121121).

The spelling of 12103091 in words is "twelve million, one hundred three thousand, ninety-one".