11312023123 has 4 divisors (see below), whose sum is σ = 11587926168. Its totient is φ = 11036120080.

The previous prime is 11312023109. The next prime is 11312023157. The reversal of 11312023123 is 32132021311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11312023123 - 2³³ = 2722088531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11312023123.

It is not an unprimeable number, because it can be changed into a prime (11312023423) 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, 137951461 + ... + 137951542.

It is an arithmetic number, because the mean of its divisors is an integer number (2896981542).

Almost surely, 2^11312023123 is an apocalyptic number.

11312023123 is a deficient number, since it is larger than the sum of its proper divisors (275903045).

11312023123 is an equidigital number, since it uses as much as digits as its factorization.

11312023123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275903044.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11312023123 its reverse (32132021311), we get a palindrome (43444044434).

It can be divided in two parts, 11312023 and 123, that added together give a triangular number (11312146 = T₄₇₅₆).

The spelling of 11312023123 in words is "eleven billion, three hundred twelve million, twenty-three thousand, one hundred twenty-three".