20111133112 has 48 divisors (see below), whose sum is σ = 44155469520. Its totient is φ = 8561952000.

The previous prime is 20111133101. The next prime is 20111133113. The reversal of 20111133112 is 21133111102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111133113) 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, 110689 + ... + 229072.

It is an arithmetic number, because the mean of its divisors is an integer number (919905615).

Almost surely, 2^20111133112 is an apocalyptic number.

It is an amenable number.

20111133112 is an abundant number, since it is smaller than the sum of its proper divisors (24044336408).

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

20111133112 is a wasteful number, since it uses less digits than its factorization.

20111133112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339932 (or 339921 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 20111133112 its reverse (21133111102), we get a palindrome (41244244214).

The spelling of 20111133112 in words is "twenty billion, one hundred eleven million, one hundred thirty-three thousand, one hundred twelve".