11231313212 has 48 divisors (see below), whose sum is σ = 23656416000. Its totient is φ = 4557855744.

The previous prime is 11231313187. The next prime is 11231313257. The reversal of 11231313212 is 21231313211.

It is a happy number.

It is a super-2 number, since 2×11231313212² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1495964 + ... + 1503452.

It is an arithmetic number, because the mean of its divisors is an integer number (492842000).

Almost surely, 2^11231313212 is an apocalyptic number.

It is an amenable number.

11231313212 is an abundant number, since it is smaller than the sum of its proper divisors (12425102788).

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

11231313212 is a wasteful number, since it uses less digits than its factorization.

11231313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10338 (or 10336 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 11231313212 its reverse (21231313211), we get a palindrome (32462626423).

Subtracting 11231313212 from its reverse (21231313211), we obtain a palindrome (9999999999).

The spelling of 11231313212 in words is "eleven billion, two hundred thirty-one million, three hundred thirteen thousand, two hundred twelve".