11311203311123 has 16 divisors (see below), whose sum is σ = 11735562216960. Its totient is φ = 10889144599200.

The previous prime is 11311203311117. The next prime is 11311203311131. The reversal of 11311203311123 is 32111330211311.

It is a de Polignac number, because none of the positive numbers 2^k-11311203311123 is a prime.

It is a super-2 number, since 2×11311203311123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311203311143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52372868 + ... + 52588398.

It is an arithmetic number, because the mean of its divisors is an integer number (733472638560).

Almost surely, 2^{11311203311123} is an apocalyptic number.

11311203311123 is a deficient number, since it is larger than the sum of its proper divisors (424358905837).

11311203311123 is a wasteful number, since it uses less digits than its factorization.

11311203311123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220858.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 11311203311123 its reverse (32111330211311), we get a palindrome (43422533522434).

The spelling of 11311203311123 in words is "eleven trillion, three hundred eleven billion, two hundred three million, three hundred eleven thousand, one hundred twenty-three".