11123312012 has 6 divisors (see below), whose sum is σ = 19465796028. Its totient is φ = 5561656004.

The previous prime is 11123311963. The next prime is 11123312017. The reversal of 11123312012 is 21021332111.

It is not an unprimeable number, because it can be changed into a prime (11123312017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390413998 + ... + 1390414005.

It is an arithmetic number, because the mean of its divisors is an integer number (3244299338).

Almost surely, 2^11123312012 is an apocalyptic number.

It is an amenable number.

11123312012 is a deficient number, since it is larger than the sum of its proper divisors (8342484016).

11123312012 is a wasteful number, since it uses less digits than its factorization.

11123312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780828007 (or 2780828005 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11123312012 its reverse (21021332111), we get a palindrome (32144644123).

The spelling of 11123312012 in words is "eleven billion, one hundred twenty-three million, three hundred twelve thousand, twelve".