111012123240 has 160 divisors (see below), whose sum is σ = 373374583560. Its totient is φ = 29583360000.

The previous prime is 111012123217. The next prime is 111012123269. The reversal of 111012123240 is 42321210111.

It can be written as a sum of positive squares in 4 ways, for example, as 104242453956 + 6769669284 = 322866^2 + 82278^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5176540 + ... + 5197940.

Almost surely, 2^111012123240 is an apocalyptic number.

111012123240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111012123240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186687291780).

111012123240 is an abundant number, since it is smaller than the sum of its proper divisors (262362460320).

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

111012123240 is a wasteful number, since it uses less digits than its factorization.

111012123240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23025 (or 23012 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 111012123240 its reverse (42321210111), we get a palindrome (153333333351).

The spelling of 111012123240 in words is "one hundred eleven billion, twelve million, one hundred twenty-three thousand, two hundred forty".