20021112112 has 20 divisors (see below), whose sum is σ = 38878482600. Its totient is φ = 9987955328.

The previous prime is 20021112103. The next prime is 20021112173. The reversal of 20021112112 is 21121112002.

It is a junction number, because it is equal to n+sod(n) for n = 20021112092 and 20021112101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405237 + ... + 1419412.

It is an arithmetic number, because the mean of its divisors is an integer number (1943924130).

Almost surely, 2^20021112112 is an apocalyptic number.

It is an amenable number.

20021112112 is a deficient number, since it is larger than the sum of its proper divisors (18857370488).

20021112112 is a wasteful number, since it uses less digits than its factorization.

20021112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825100 (or 2825094 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021112112 its reverse (21121112002), we get a palindrome (41142224114).

The spelling of 20021112112 in words is "twenty billion, twenty-one million, one hundred twelve thousand, one hundred twelve".