20021022112 has 144 divisors (see below), whose sum is σ = 49517275752. Its totient is φ = 7898204160.

The previous prime is 20021022079. The next prime is 20021022127. The reversal of 20021022112 is 21122012002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5369372176 + 14651649936 = 73276^2 + 121044^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 20021022092 and 20021022101.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8580498 + ... + 8582830.

Almost surely, 2^20021022112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021022112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24758637876).

20021022112 is an abundant number, since it is smaller than the sum of its proper divisors (29496253640).

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

20021022112 is a wasteful number, since it uses less digits than its factorization.

20021022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791 (or 2776 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021022112 its reverse (21122012002), we get a palindrome (41143034114).

The spelling of 20021022112 in words is "twenty billion, twenty-one million, twenty-two thousand, one hundred twelve".