11312011320 has 64 divisors (see below), whose sum is σ = 34010457120. Its totient is φ = 3009921024.

The previous prime is 11312011283. The next prime is 11312011351. The reversal of 11312011320 is 2311021311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11312011320.

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, 48297 + ... + 157976.

Almost surely, 2^11312011320 is an apocalyptic number.

11312011320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11312011320 is an abundant number, since it is smaller than the sum of its proper divisors (22698445800).

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

11312011320 is a wasteful number, since it uses less digits than its factorization.

11312011320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206744 (or 206740 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11312011320 its reverse (2311021311), we get a palindrome (13623032631).

Subtracting from 11312011320 its reverse (2311021311), we obtain a palindrome (9000990009).

The spelling of 11312011320 in words is "eleven billion, three hundred twelve million, eleven thousand, three hundred twenty".