1211211100112 has 80 divisors (see below), whose sum is σ = 2542157291520. Its totient is φ = 555725216256.

The previous prime is 1211211100067. The next prime is 1211211100139. The reversal of 1211211100112 is 2110011121121.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 52560689 + ... + 52583727.

It is an arithmetic number, because the mean of its divisors is an integer number (31776966144).

Almost surely, 2^{1211211100112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211211100112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1271078645760).

1211211100112 is an abundant number, since it is smaller than the sum of its proper divisors (1330946191408).

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

1211211100112 is a wasteful number, since it uses less digits than its factorization.

1211211100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24540 (or 24534 counting only the distinct ones).

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

Adding to 1211211100112 its reverse (2110011121121), we get a palindrome (3321222221233).

The spelling of 1211211100112 in words is "one trillion, two hundred eleven billion, two hundred eleven million, one hundred thousand, one hundred twelve".