1121212111100 has 36 divisors (see below), whose sum is σ = 2433115630008. Its totient is φ = 448469112000.

The previous prime is 1121212111093. The next prime is 1121212111109. The reversal of 1121212111100 is 11112121211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121212111109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2912915 + ... + 3275285.

It is an arithmetic number, because the mean of its divisors is an integer number (67586545278).

Almost surely, 2^{1121212111100} is an apocalyptic number.

1121212111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121212111100 is an abundant number, since it is smaller than the sum of its proper divisors (1311903518908).

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

1121212111100 is a wasteful number, since it uses less digits than its factorization.

1121212111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393326 (or 393319 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1121212111100 its reverse (11112121211), we get a palindrome (1132324232311).

The spelling of 1121212111100 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, one hundred".