1100212121112 has 64 divisors (see below), whose sum is σ = 2973635491680. Its totient is φ = 337209556992.

The previous prime is 1100212121101. The next prime is 1100212121117. The reversal of 1100212121112 is 2111212120011.

It is a happy number.

It is a super-2 number, since 2×1100212121112² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1100212121091 and 1100212121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100212121117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6780363 + ... + 6940730.

Almost surely, 2^{1100212121112} is an apocalyptic number.

1100212121112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1100212121112 is an abundant number, since it is smaller than the sum of its proper divisors (1873423370568).

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

1100212121112 is a wasteful number, since it uses less digits than its factorization.

1100212121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13721372 (or 13721368 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1100212121112 its reverse (2111212120011), we get a palindrome (3211424241123).

The spelling of 1100212121112 in words is "one trillion, one hundred billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twelve".