111221022040 has 32 divisors (see below), whose sum is σ = 250490115360. Its totient is φ = 44445241600.

The previous prime is 111221021971. The next prime is 111221022043. The reversal of 111221022040 is 40220122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221022043) 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, 1307221 + ... + 1389700.

It is an arithmetic number, because the mean of its divisors is an integer number (7827816105).

Almost surely, 2^111221022040 is an apocalyptic number.

111221022040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221022040 is an abundant number, since it is smaller than the sum of its proper divisors (139269093320).

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

111221022040 is a wasteful number, since it uses less digits than its factorization.

111221022040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697963 (or 2697959 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 111221022040 its reverse (40220122111), we get a palindrome (151441144151).

The spelling of 111221022040 in words is "one hundred eleven billion, two hundred twenty-one million, twenty-two thousand, forty".