111215016423 has 48 divisors (see below), whose sum is σ = 195132321280. Its totient is φ = 59622028992.

The previous prime is 111215016391. The next prime is 111215016427. The reversal of 111215016423 is 324610512111.

111215016423 is a `hidden beast` number, since 1 + 1 + 1 + 2 + 15 + 0 + 1 + 642 + 3 = 666.

It is not a de Polignac number, because 111215016423 - 2⁵ = 111215016391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111215016427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 327736 + ... + 574317.

Almost surely, 2^111215016423 is an apocalyptic number.

111215016423 is a deficient number, since it is larger than the sum of its proper divisors (83917304857).

111215016423 is a wasteful number, since it uses less digits than its factorization.

111215016423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902188 (or 902185 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 111215016423 its reverse (324610512111), we get a palindrome (435825528534).

The spelling of 111215016423 in words is "one hundred eleven billion, two hundred fifteen million, sixteen thousand, four hundred twenty-three".