11111021122012 has 12 divisors (see below), whose sum is σ = 22222042244080. Its totient is φ = 4761866195136.

The previous prime is 11111021122009. The next prime is 11111021122013. The reversal of 11111021122012 is 21022112011111.

11111021122012 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111021122013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198411091437 + ... + 198411091492.

Almost surely, 2^{11111021122012} is an apocalyptic number.

It is an amenable number.

11111021122012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11111021122012 is a wasteful number, since it uses less digits than its factorization.

11111021122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396822182940 (or 396822182938 counting only the distinct ones).

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

Adding to 11111021122012 its reverse (21022112011111), we get a palindrome (32133133133123).

The spelling of 11111021122012 in words is "eleven trillion, one hundred eleven billion, twenty-one million, one hundred twenty-two thousand, twelve".