11311011123 has 4 divisors (see below), whose sum is σ = 15081348168. Its totient is φ = 7540674080.

The previous prime is 11311011121. The next prime is 11311011133. The reversal of 11311011123 is 32111011311.

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 11311011123 - 2¹ = 11311011121 is a prime.

It is a super-2 number, since 2×11311011123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11311011121) 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, 1885168518 + ... + 1885168523.

It is an arithmetic number, because the mean of its divisors is an integer number (3770337042).

Almost surely, 2^11311011123 is an apocalyptic number.

11311011123 is a deficient number, since it is larger than the sum of its proper divisors (3770337045).

11311011123 is an equidigital number, since it uses as much as digits as its factorization.

11311011123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770337044.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 11311011123 its reverse (32111011311), we get a palindrome (43422022434).

The spelling of 11311011123 in words is "eleven billion, three hundred eleven million, eleven thousand, one hundred twenty-three".