111231323120 has 40 divisors (see below), whose sum is σ = 258638423760. Its totient is φ = 44488125440.

The previous prime is 111231323081. The next prime is 111231323123. The reversal of 111231323120 is 21323132111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111231323092 and 111231323101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231323123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815000 + ... + 941640.

It is an arithmetic number, because the mean of its divisors is an integer number (6465960594).

Almost surely, 2^111231323120 is an apocalyptic number.

111231323120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111231323120 is an abundant number, since it is smaller than the sum of its proper divisors (147407100640).

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

111231323120 is a wasteful number, since it uses less digits than its factorization.

111231323120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137633 (or 137627 counting only the distinct ones).

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

Adding to 111231323120 its reverse (21323132111), we get a palindrome (132554455231).

The spelling of 111231323120 in words is "one hundred eleven billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred twenty".