20021021112 has 16 divisors (see below), whose sum is σ = 50052552840. Its totient is φ = 6673673696.

The previous prime is 20021021093. The next prime is 20021021177. The reversal of 20021021112 is 21112012002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417104583 + ... + 417104630.

Almost surely, 2^20021021112 is an apocalyptic number.

It is an amenable number.

20021021112 is an abundant number, since it is smaller than the sum of its proper divisors (30031531728).

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

20021021112 is a wasteful number, since it uses less digits than its factorization.

20021021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834209222 (or 834209218 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021021112 its reverse (21112012002), we get a palindrome (41133033114).

The spelling of 20021021112 in words is "twenty billion, twenty-one million, twenty-one thousand, one hundred twelve".