11231320012 has 12 divisors (see below), whose sum is σ = 21441611016. Its totient is φ = 5105145440.

The previous prime is 11231320007. The next prime is 11231320019. The reversal of 11231320012 is 21002313211.

It is a super-2 number, since 2×11231320012² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11231320019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127628593 + ... + 127628680.

It is an arithmetic number, because the mean of its divisors is an integer number (1786800918).

Almost surely, 2^11231320012 is an apocalyptic number.

It is an amenable number.

11231320012 is a deficient number, since it is larger than the sum of its proper divisors (10210291004).

11231320012 is a wasteful number, since it uses less digits than its factorization.

11231320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255257288 (or 255257286 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11231320012 its reverse (21002313211), we get a palindrome (32233633223).

The spelling of 11231320012 in words is "eleven billion, two hundred thirty-one million, three hundred twenty thousand, twelve".