20001002022021 has 32 divisors (see below), whose sum is σ = 26896841072640. Its totient is φ = 13220114854464.

The previous prime is 20001002022011. The next prime is 20001002022049. The reversal of 20001002022021 is 12022020010002.

It is not a de Polignac number, because 20001002022021 - 2⁷ = 20001002021893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001002021988 and 20001002022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001002022011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415633000 + ... + 415681118.

It is an arithmetic number, because the mean of its divisors is an integer number (840526283520).

Almost surely, 2^{20001002022021} is an apocalyptic number.

It is an amenable number.

20001002022021 is a deficient number, since it is larger than the sum of its proper divisors (6895839050619).

20001002022021 is a wasteful number, since it uses less digits than its factorization.

20001002022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50865.

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

Adding to 20001002022021 its reverse (12022020010002), we get a palindrome (32023022032023).

The spelling of 20001002022021 in words is "twenty trillion, one billion, two million, twenty-two thousand, twenty-one".