11231123320 has 16 divisors (see below), whose sum is σ = 25270027560. Its totient is φ = 4492449312.

The previous prime is 11231123291. The next prime is 11231123329. The reversal of 11231123320 is 2332113211.

It is a super-2 number, since 2×11231123320² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231123329) 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, 140389002 + ... + 140389081.

Almost surely, 2^11231123320 is an apocalyptic number.

11231123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11231123320 is an abundant number, since it is smaller than the sum of its proper divisors (14038904240).

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

11231123320 is a wasteful number, since it uses less digits than its factorization.

11231123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280778094 (or 280778090 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11231123320 its reverse (2332113211), we get a palindrome (13563236531).

The spelling of 11231123320 in words is "eleven billion, two hundred thirty-one million, one hundred twenty-three thousand, three hundred twenty".