123000011311 has 16 divisors (see below), whose sum is σ = 131914461600. Its totient is φ = 114276400128.

The previous prime is 123000011293. The next prime is 123000011341. The reversal of 123000011311 is 113110000321.

It is not a de Polignac number, because 123000011311 - 2²⁹ = 122463140399 is a prime.

It is a super-2 number, since 2×123000011311² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123000011291 and 123000011300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123000011341) 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, 861160 + ... + 993778.

It is an arithmetic number, because the mean of its divisors is an integer number (8244653850).

Almost surely, 2^123000011311 is an apocalyptic number.

123000011311 is a deficient number, since it is larger than the sum of its proper divisors (8914450289).

123000011311 is a wasteful number, since it uses less digits than its factorization.

123000011311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133338.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 123000011311 its reverse (113110000321), we get a palindrome (236110011632).

The spelling of 123000011311 in words is "one hundred twenty-three billion, eleven thousand, three hundred eleven".