1121211331212 has 48 divisors (see below), whose sum is σ = 3008239845632. Its totient is φ = 318380777280.

The previous prime is 1121211331211. The next prime is 1121211331231. The reversal of 1121211331212 is 2121331121211.

It is a super-2 number, since 2×1121211331212² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1121211331211) 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 15 ways as a sum of consecutive naturals, for example, 40930339 + ... + 40957722.

Almost surely, 2^{1121211331212} is an apocalyptic number.

1121211331212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121211331212 is an abundant number, since it is smaller than the sum of its proper divisors (1887028514420).

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

1121211331212 is a wasteful number, since it uses less digits than its factorization.

1121211331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81888238 (or 81888236 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

Adding to 1121211331212 its reverse (2121331121211), we get a palindrome (3242542452423).

The spelling of 1121211331212 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, three hundred thirty-one thousand, two hundred twelve".