20011121111112 has 32 divisors (see below), whose sum is σ = 50028648885600. Its totient is φ = 6670260889344.

The previous prime is 20011121111089. The next prime is 20011121111129. The reversal of 20011121111112 is 21111112111002.

It is a junction number, because it is equal to n+sod(n) for n = 20011121111091 and 20011121111100.

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, 5596162 + ... + 8446257.

It is an arithmetic number, because the mean of its divisors is an integer number (1563395277675).

Almost surely, 2^{20011121111112} is an apocalyptic number.

It is an amenable number.

20011121111112 is an abundant number, since it is smaller than the sum of its proper divisors (30017527774488).

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

20011121111112 is a wasteful number, since it uses less digits than its factorization.

20011121111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14101805 (or 14101801 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 20011121111112 its reverse (21111112111002), we get a palindrome (41122233222114).

The spelling of 20011121111112 in words is "twenty trillion, eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twelve".