20201221052000 has 96 divisors (see below), whose sum is σ = 51235510120704. Its totient is φ = 7819827456000.

The previous prime is 20201221051993. The next prime is 20201221052003. The reversal of 20201221052000 is 25012210202.

It is a self number, because there is not a number n which added to its sum of digits gives 20201221052000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201221052003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81332537 + ... + 81580536.

It is an arithmetic number, because the mean of its divisors is an integer number (533703230424).

Almost surely, 2^{20201221052000} is an apocalyptic number.

20201221052000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201221052000 is an abundant number, since it is smaller than the sum of its proper divisors (31034289068704).

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

20201221052000 is a wasteful number, since it uses less digits than its factorization.

20201221052000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162913129 (or 162913111 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 20201221052000 its reverse (25012210202), we get a palindrome (20226233262202).

The spelling of 20201221052000 in words is "twenty trillion, two hundred one billion, two hundred twenty-one million, fifty-two thousand".