111312111301212 has 96 divisors (see below), whose sum is σ = 280090675226880. Its totient is φ = 34290876372480.

The previous prime is 111312111301189. The next prime is 111312111301243. The reversal of 111312111301212 is 212103111213111.

It is a super-2 number, since 2×111312111301212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108646723 + ... + 109666469.

It is an arithmetic number, because the mean of its divisors is an integer number (2917611200280).

Almost surely, 2^{111312111301212} is an apocalyptic number.

111312111301212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111312111301212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140045337613440).

111312111301212 is an abundant number, since it is smaller than the sum of its proper divisors (168778563925668).

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

111312111301212 is a wasteful number, since it uses less digits than its factorization.

111312111301212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031491 (or 1031489 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 111312111301212 its reverse (212103111213111), we get a palindrome (323415222514323).

The spelling of 111312111301212 in words is "one hundred eleven trillion, three hundred twelve billion, one hundred eleven million, three hundred one thousand, two hundred twelve".