111212013132 has 36 divisors (see below), whose sum is σ = 306675552456. Its totient is φ = 33700609920.

The previous prime is 111212013119. The next prime is 111212013139. The reversal of 111212013132 is 231310212111.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×111212013132² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (111212013139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140418813 + ... + 140419604.

It is an arithmetic number, because the mean of its divisors is an integer number (8518765346).

Almost surely, 2^111212013132 is an apocalyptic number.

111212013132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111212013132 is an abundant number, since it is smaller than the sum of its proper divisors (195463539324).

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

111212013132 is a wasteful number, since it uses less digits than its factorization.

111212013132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280838438 (or 280838433 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111212013132 its reverse (231310212111), we get a palindrome (342522225243).

The spelling of 111212013132 in words is "one hundred eleven billion, two hundred twelve million, thirteen thousand, one hundred thirty-two".