20111121112 has 32 divisors (see below), whose sum is σ = 38177899200. Its totient is φ = 9930445344.

The previous prime is 20111121103. The next prime is 20111121139. The reversal of 20111121112 is 21112111102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20111121092 and 20111121101.

It is a congruent number.

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, 2350939 + ... + 2359477.

It is an arithmetic number, because the mean of its divisors is an integer number (1193059350).

Almost surely, 2^20111121112 is an apocalyptic number.

It is an amenable number.

20111121112 is a deficient number, since it is larger than the sum of its proper divisors (18066778088).

20111121112 is a wasteful number, since it uses less digits than its factorization.

20111121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175 (or 12171 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20111121112 its reverse (21112111102), we get a palindrome (41223232214).

The spelling of 20111121112 in words is "twenty billion, one hundred eleven million, one hundred twenty-one thousand, one hundred twelve".