105131123 has 4 divisors (see below), whose sum is σ = 110664360. Its totient is φ = 99597888.

The previous prime is 105131071. The next prime is 105131129. The reversal of 105131123 is 321131501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321131501 = 8861 ⋅36241.

It is a cyclic number.

It is not a de Polignac number, because 105131123 - 2¹⁰ = 105130099 is a prime.

It is a super-2 number, since 2×105131123² = 22105106046482258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105131129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2766590 + ... + 2766627.

It is an arithmetic number, because the mean of its divisors is an integer number (27666090).

Almost surely, 2^105131123 is an apocalyptic number.

105131123 is a deficient number, since it is larger than the sum of its proper divisors (5533237).

105131123 is an equidigital number, since it uses as much as digits as its factorization.

105131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5533236.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 105131123 is about 10253.3469169828. The cubic root of 105131123 is about 471.9656967194.

Adding to 105131123 its reverse (321131501), we get a palindrome (426262624).

The spelling of 105131123 in words is "one hundred five million, one hundred thirty-one thousand, one hundred twenty-three".