111421220120441 has 32 divisors (see below), whose sum is σ = 144580979859456. Its totient is φ = 84021028779600.

The previous prime is 111421220120437. The next prime is 111421220120447. The reversal of 111421220120441 is 144021022124111.

It is a happy number.

It is not a de Polignac number, because 111421220120441 - 2² = 111421220120437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111421220120441.

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 31 ways as a sum of consecutive naturals, for example, 192596915 + ... + 193174568.

It is an arithmetic number, because the mean of its divisors is an integer number (4518155620608).

Almost surely, 2^{111421220120441} is an apocalyptic number.

111421220120441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111421220120441 is a deficient number, since it is larger than the sum of its proper divisors (33159759739015).

111421220120441 is an equidigital number, since it uses as much as digits as its factorization.

111421220120441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385771554 (or 385771532 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

Adding to 111421220120441 its reverse (144021022124111), we get a palindrome (255442242244552).

The spelling of 111421220120441 in words is "one hundred eleven trillion, four hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, four hundred forty-one".