111211231243440 has 240 divisors, whose sum is σ = 349984399877280. Its totient is φ = 29210325811200.

The previous prime is 111211231243417. The next prime is 111211231243451. The reversal of 111211231243440 is 44342132112111.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 111211231243398 and 111211231243407.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 902854176 + ... + 902977344.

It is an arithmetic number, because the mean of its divisors is an integer number (1458268332822).

Almost surely, 2^{111211231243440} is an apocalyptic number.

111211231243440 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 111211231243440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174992199938640).

111211231243440 is an abundant number, since it is smaller than the sum of its proper divisors (238773168633840).

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

111211231243440 is a wasteful number, since it uses less digits than its factorization.

111211231243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123672 (or 123473 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

Adding to 111211231243440 its reverse (44342132112111), we get a palindrome (155553363355551).

The spelling of 111211231243440 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred thirty-one million, two hundred forty-three thousand, four hundred forty".