11121233212 has 24 divisors (see below), whose sum is σ = 19511921520. Its totient is φ = 5546419200.

The previous prime is 11121233191. The next prime is 11121233219. The reversal of 11121233212 is 21233212111.

It is a self number, because there is not a number n which added to its sum of digits gives 11121233212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121233219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3410839 + ... + 3414097.

It is an arithmetic number, because the mean of its divisors is an integer number (812996730).

Almost surely, 2^11121233212 is an apocalyptic number.

It is an amenable number.

11121233212 is a deficient number, since it is larger than the sum of its proper divisors (8390688308).

11121233212 is a wasteful number, since it uses less digits than its factorization.

11121233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181 (or 5179 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 11121233212 its reverse (21233212111), we get a palindrome (32354445323).

It can be divided in two parts, 111 and 21233212, that multiplied together give a palindrome (2356886532).

The spelling of 11121233212 in words is "eleven billion, one hundred twenty-one million, two hundred thirty-three thousand, two hundred twelve".