1121211212112 has 60 divisors (see below), whose sum is σ = 3137909901984. Its totient is φ = 373728048960.

The previous prime is 1121211212063. The next prime is 1121211212117. The reversal of 1121211212112 is 2112121121211.

It is a happy number.

It is a super-2 number, since 2×1121211212112² (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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121211212117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8813437 + ... + 8939747.

Almost surely, 2^{1121211212112} is an apocalyptic number.

1121211212112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121211212112 is an abundant number, since it is smaller than the sum of its proper divisors (2016698689872).

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

1121211212112 is a wasteful number, since it uses less digits than its factorization.

1121211212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187968 (or 187959 counting only the distinct ones).

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

Adding to 1121211212112 its reverse (2112121121211), we get a palindrome (3233332333323).

Subtracting 1121211212112 from its reverse (2112121121211), we obtain a palindrome (990909909099).

It can be divided in two parts, 112121121211 and 2, that multiplied together give a palindrome (224242242422).

The spelling of 1121211212112 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twelve thousand, one hundred twelve".