20200001221000 has 256 divisors, whose sum is σ = 50597357990400. Its totient is φ = 7525395072000.

The previous prime is 20200001220961. The next prime is 20200001221013. The reversal of 20200001221000 is 12210000202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3346029982 + ... + 3346036018.

It is an arithmetic number, because the mean of its divisors is an integer number (197645929650).

Almost surely, 2^{20200001221000} is an apocalyptic number.

20200001221000 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 20200001221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25298678995200).

20200001221000 is an abundant number, since it is smaller than the sum of its proper divisors (30397356769400).

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

20200001221000 is a wasteful number, since it uses less digits than its factorization.

20200001221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9025 (or 9011 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20200001221000 its reverse (12210000202), we get a palindrome (20212211221202).

The spelling of 20200001221000 in words is "twenty trillion, two hundred billion, one million, two hundred twenty-one thousand".