22021201020 has 384 divisors, whose sum is σ = 80923852800. Its totient is φ = 4344357888.

The previous prime is 22021200917. The next prime is 22021201021. The reversal of 22021201020 is 2010212022.

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

It is a junction number, because it is equal to n+sod(n) for n = 22021200987 and 22021201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021201021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8194117 + ... + 8196803.

It is an arithmetic number, because the mean of its divisors is an integer number (210739200).

Almost surely, 2^22021201020 is an apocalyptic number.

22021201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22021201020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40461926400).

22021201020 is an abundant number, since it is smaller than the sum of its proper divisors (58902651780).

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

22021201020 is a wasteful number, since it uses less digits than its factorization.

22021201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817 (or 2815 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22021201020 its reverse (2010212022), we get a palindrome (24031413042).

The spelling of 22021201020 in words is "twenty-two billion, twenty-one million, two hundred one thousand, twenty".