111421220120440 has 16 divisors (see below), whose sum is σ = 250697745271080. Its totient is φ = 44568488048160.

The previous prime is 111421220120437. The next prime is 111421220120447. The reversal of 111421220120440 is 44021022124111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421220120447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1392765251466 + ... + 1392765251545.

Almost surely, 2^{111421220120440} is an apocalyptic number.

111421220120440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111421220120440 is an abundant number, since it is smaller than the sum of its proper divisors (139276525150640).

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

111421220120440 is a wasteful number, since it uses less digits than its factorization.

111421220120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785530503022 (or 2785530503018 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 111421220120440 its reverse (44021022124111), we get a palindrome (155442242244551).

The spelling of 111421220120440 in words is "one hundred eleven trillion, four hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, four hundred forty".