20112111020 has 24 divisors (see below), whose sum is σ = 42622918800. Its totient is φ = 7971037632.

The previous prime is 20112110989. The next prime is 20112111109. The reversal of 20112111020 is 2011121102.

It is a junction number, because it is equal to n+sod(n) for n = 20112110992 and 20112111010.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4610690 + ... + 4615049.

It is an arithmetic number, because the mean of its divisors is an integer number (1775954950).

Almost surely, 2^20112111020 is an apocalyptic number.

20112111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112111020 is an abundant number, since it is smaller than the sum of its proper divisors (22510807780).

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

20112111020 is a wasteful number, since it uses less digits than its factorization.

20112111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9225857 (or 9225855 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20112111020 its reverse (2011121102), we get a palindrome (22123232122).

The spelling of 20112111020 in words is "twenty billion, one hundred twelve million, one hundred eleven thousand, twenty".