1212111131112 has 80 divisors (see below), whose sum is σ = 3880038291360. Its totient is φ = 346317464736.

The previous prime is 1212111131111. The next prime is 1212111131123. The reversal of 1212111131112 is 2111311112121.

1212111131112 is a `hidden beast` number, since 121 + 211 + 11 + 311 + 12 = 666.

It is a super-2 number, since 2×1212111131112² (a number of 25 digits) contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (1212111131111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 133605598 + ... + 133614669.

It is an arithmetic number, because the mean of its divisors is an integer number (48500478642).

Almost surely, 2^{1212111131112} is an apocalyptic number.

1212111131112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212111131112 is an abundant number, since it is smaller than the sum of its proper divisors (2667927160248).

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

1212111131112 is a wasteful number, since it uses less digits than its factorization.

1212111131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267220292 (or 267220279 counting only the distinct ones).

The product of its digits is 24, while the sum is 18.

Adding to 1212111131112 its reverse (2111311112121), we get a palindrome (3323422243233).

The spelling of 1212111131112 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred thirty-one thousand, one hundred twelve".