1122111121212 has 48 divisors (see below), whose sum is σ = 2980132528800. Its totient is φ = 364914184320.

The previous prime is 1122111121199. The next prime is 1122111121223. The reversal of 1122111121212 is 2121211112211.

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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 126701887 + ... + 126710742.

It is an arithmetic number, because the mean of its divisors is an integer number (62086094350).

Almost surely, 2^{1122111121212} is an apocalyptic number.

1122111121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1122111121212 is an abundant number, since it is smaller than the sum of its proper divisors (1858021407588).

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

1122111121212 is a wasteful number, since it uses less digits than its factorization.

1122111121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253412683 (or 253412675 counting only the distinct ones).

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

Adding to 1122111121212 its reverse (2121211112211), we get a palindrome (3243322233423).

Subtracting 1122111121212 from its reverse (2121211112211), we obtain a palindrome (999099990999).

The spelling of 1122111121212 in words is "one trillion, one hundred twenty-two billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twelve".