20221001100 has 216 divisors, whose sum is σ = 65875314960. Its totient is φ = 5181872640.

The previous prime is 20221001069. The next prime is 20221001111. The reversal of 20221001100 is 110012202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5922994 + ... + 5926406.

It is an arithmetic number, because the mean of its divisors is an integer number (304978310).

Almost surely, 2^20221001100 is an apocalyptic number.

20221001100 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 20221001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32937657480).

20221001100 is an abundant number, since it is smaller than the sum of its proper divisors (45654313860).

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

20221001100 is a wasteful number, since it uses less digits than its factorization.

20221001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689 (or 3679 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20221001100 its reverse (110012202), we get a palindrome (20331013302).

The spelling of 20221001100 in words is "twenty billion, two hundred twenty-one million, one thousand, one hundred".