111221001240 has 32 divisors (see below), whose sum is σ = 333663004080. Its totient is φ = 29658933632.

The previous prime is 111221001239. The next prime is 111221001247. The reversal of 111221001240 is 42100122111.

111221001240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×111221001240² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221001247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463420719 + ... + 463420958.

Almost surely, 2^111221001240 is an apocalyptic number.

111221001240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221001240 is an abundant number, since it is smaller than the sum of its proper divisors (222442002840).

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

111221001240 is a wasteful number, since it uses less digits than its factorization.

111221001240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926841691 (or 926841687 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111221001240 its reverse (42100122111), we get a palindrome (153321123351).

The spelling of 111221001240 in words is "one hundred eleven billion, two hundred twenty-one million, one thousand, two hundred forty".