111421105215 has 64 divisors (see below), whose sum is σ = 205758873600. Its totient is φ = 50432989824.

The previous prime is 111421105193. The next prime is 111421105241. The reversal of 111421105215 is 512501124111.

It is not a de Polignac number, because 111421105215 - 2⁵ = 111421105183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5521434 + ... + 5541576.

It is an arithmetic number, because the mean of its divisors is an integer number (3214982400).

Almost surely, 2^111421105215 is an apocalyptic number.

111421105215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111421105215 is a deficient number, since it is larger than the sum of its proper divisors (94337768385).

111421105215 is a wasteful number, since it uses less digits than its factorization.

111421105215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20676.

The product of its (nonzero) digits is 400, while the sum is 24.

Adding to 111421105215 its reverse (512501124111), we get a palindrome (623922229326).

The spelling of 111421105215 in words is "one hundred eleven billion, four hundred twenty-one million, one hundred five thousand, two hundred fifteen".