20011121112 has 64 divisors (see below), whose sum is σ = 52719932160. Its totient is φ = 6317168000.

The previous prime is 20011121101. The next prime is 20011121113. The reversal of 20011121112 is 21112111002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011121113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123714 + ... + 235217.

It is an arithmetic number, because the mean of its divisors is an integer number (823748940).

Almost surely, 2^20011121112 is an apocalyptic number.

It is an amenable number.

20011121112 is an abundant number, since it is smaller than the sum of its proper divisors (32708811048).

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

20011121112 is a wasteful number, since it uses less digits than its factorization.

20011121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359064 (or 359060 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20011121112 its reverse (21112111002), we get a palindrome (41123232114).

The spelling of 20011121112 in words is "twenty billion, eleven million, one hundred twenty-one thousand, one hundred twelve".