11123233212 has 144 divisors (see below), whose sum is σ = 34009258752. Its totient is φ = 2760975360.

The previous prime is 11123233201. The next prime is 11123233223. The reversal of 11123233212 is 21233232111.

It is an interprime number because it is at equal distance from previous prime (11123233201) and next prime (11123233223).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218287 + ... + 264377.

It is an arithmetic number, because the mean of its divisors is an integer number (236175408).

Almost surely, 2^11123233212 is an apocalyptic number.

11123233212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11123233212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17004629376).

11123233212 is an abundant number, since it is smaller than the sum of its proper divisors (22886025540).

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

11123233212 is a wasteful number, since it uses less digits than its factorization.

11123233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46148 (or 46133 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 11123233212 its reverse (21233232111), we get a palindrome (32356465323).

The spelling of 11123233212 in words is "eleven billion, one hundred twenty-three million, two hundred thirty-three thousand, two hundred twelve".