20201222112 has 96 divisors (see below), whose sum is σ = 54860252832. Its totient is φ = 6503768064.

The previous prime is 20201222099. The next prime is 20201222141. The reversal of 20201222112 is 21122210202.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 20201222091 and 20201222100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465868 + ... + 507380.

It is an arithmetic number, because the mean of its divisors is an integer number (571460967).

Almost surely, 2^20201222112 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 20201222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27430126416).

20201222112 is an abundant number, since it is smaller than the sum of its proper divisors (34659030720).

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

20201222112 is a wasteful number, since it uses less digits than its factorization.

20201222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41700 (or 41692 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20201222112 its reverse (21122210202), we get a palindrome (41323432314).

The spelling of 20201222112 in words is "twenty billion, two hundred one million, two hundred twenty-two thousand, one hundred twelve".