11323123015 has 4 divisors (see below), whose sum is σ = 13587747624. Its totient is φ = 9058498408.

The previous prime is 11323122991. The next prime is 11323123039. The reversal of 11323123015 is 51032132311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51032132311 = 14957 ⋅3411923.

It is an interprime number because it is at equal distance from previous prime (11323122991) and next prime (11323123039).

It is a cyclic number.

It is not a de Polignac number, because 11323123015 - 2⁷ = 11323122887 is a prime.

It is a super-2 number, since 2×11323123015² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1132312297 + ... + 1132312306.

It is an arithmetic number, because the mean of its divisors is an integer number (3396936906).

Almost surely, 2^11323123015 is an apocalyptic number.

11323123015 is a deficient number, since it is larger than the sum of its proper divisors (2264624609).

11323123015 is an equidigital number, since it uses as much as digits as its factorization.

11323123015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264624608.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 11323123015 its reverse (51032132311), we get a palindrome (62355255326).

The spelling of 11323123015 in words is "eleven billion, three hundred twenty-three million, one hundred twenty-three thousand, fifteen".