11213123112 has 64 divisors (see below), whose sum is σ = 31156569600. Its totient is φ = 3736627200.

The previous prime is 11213123071. The next prime is 11213123113. The reversal of 11213123112 is 21132131211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (11213123113) 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, 1163112 + ... + 1172712.

It is an arithmetic number, because the mean of its divisors is an integer number (486821400).

Almost surely, 2^11213123112 is an apocalyptic number.

11213123112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11213123112 is an abundant number, since it is smaller than the sum of its proper divisors (19943446488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11213123112 is a wasteful number, since it uses less digits than its factorization.

11213123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15023 (or 15013 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11213123112 its reverse (21132131211), we get a palindrome (32345254323).

The spelling of 11213123112 in words is "eleven billion, two hundred thirteen million, one hundred twenty-three thousand, one hundred twelve".