1211121111112 has 32 divisors (see below), whose sum is σ = 2478588504480. Its totient is φ = 550221746560.

The previous prime is 1211121111091. The next prime is 1211121111121. The reversal of 1211121111112 is 2111111211121.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3428818 + ... + 3765505.

It is an arithmetic number, because the mean of its divisors is an integer number (77455890765).

Almost surely, 2^{1211121111112} is an apocalyptic number.

It is an amenable number.

1211121111112 is an abundant number, since it is smaller than the sum of its proper divisors (1267467393368).

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

1211121111112 is a wasteful number, since it uses less digits than its factorization.

1211121111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7196253 (or 7196249 counting only the distinct ones).

The product of its digits is 8, while the sum is 16.

Adding to 1211121111112 its reverse (2111111211121), we get a palindrome (3322232322233).

The spelling of 1211121111112 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twelve".