111616211523 has 16 divisors (see below), whose sum is σ = 150719866880. Its totient is φ = 73461862656.

The previous prime is 111616211513. The next prime is 111616211533. The reversal of 111616211523 is 325112616111.

It is an interprime number because it is at equal distance from previous prime (111616211513) and next prime (111616211533).

It is not a de Polignac number, because 111616211523 - 2⁶ = 111616211459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111616211513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3876486 + ... + 3905172.

It is an arithmetic number, because the mean of its divisors is an integer number (9419991680).

Almost surely, 2^111616211523 is an apocalyptic number.

111616211523 is a deficient number, since it is larger than the sum of its proper divisors (39103655357).

111616211523 is a wasteful number, since it uses less digits than its factorization.

111616211523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45186.

The product of its digits is 2160, while the sum is 30.

Adding to 111616211523 its reverse (325112616111), we get a palindrome (436728827634).

The spelling of 111616211523 in words is "one hundred eleven billion, six hundred sixteen million, two hundred eleven thousand, five hundred twenty-three".