1121111212212 has 72 divisors (see below), whose sum is σ = 2868443192160. Its totient is φ = 369167947200.

The previous prime is 1121111212201. The next prime is 1121111212219. The reversal of 1121111212212 is 2122121111211.

It is a happy number.

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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121111212219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1262739 + ... + 1958757.

It is an arithmetic number, because the mean of its divisors is an integer number (39839488780).

Almost surely, 2^{1121111212212} is an apocalyptic number.

1121111212212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121111212212 is an abundant number, since it is smaller than the sum of its proper divisors (1747331979948).

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

1121111212212 is a wasteful number, since it uses less digits than its factorization.

1121111212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696573 (or 696568 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 1121111212212 its reverse (2122121111211), we get a palindrome (3243232323423).

The spelling of 1121111212212 in words is "one trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, two hundred twelve".