111216111252 has 24 divisors (see below), whose sum is σ = 267875365632. Its totient is φ = 35876164800.

The previous prime is 111216111217. The next prime is 111216111257. The reversal of 111216111252 is 252111612111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111216111257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149483649 + ... + 149484392.

It is an arithmetic number, because the mean of its divisors is an integer number (11161473568).

Almost surely, 2^111216111252 is an apocalyptic number.

111216111252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111216111252 is an abundant number, since it is smaller than the sum of its proper divisors (156659254380).

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

111216111252 is a wasteful number, since it uses less digits than its factorization.

111216111252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298968079 (or 298968077 counting only the distinct ones).

The product of its digits is 240, while the sum is 24.

Adding to 111216111252 its reverse (252111612111), we get a palindrome (363327723363).

The spelling of 111216111252 in words is "one hundred eleven billion, two hundred sixteen million, one hundred eleven thousand, two hundred fifty-two".