20001121022021 has 8 divisors (see below), whose sum is σ = 20563383228960. Its totient is φ = 19440000466128.

The previous prime is 20001121021967. The next prime is 20001121022059. The reversal of 20001121022021 is 12022012110002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20001121022021 - 2²² = 20001116827717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001121021987 and 20001121022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001121022081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285377231 + ... + 285447308.

It is an arithmetic number, because the mean of its divisors is an integer number (2570422903620).

Almost surely, 2^{20001121022021} is an apocalyptic number.

It is an amenable number.

20001121022021 is a deficient number, since it is larger than the sum of its proper divisors (562262206939).

20001121022021 is an equidigital number, since it uses as much as digits as its factorization.

20001121022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570825523.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20001121022021 its reverse (12022012110002), we get a palindrome (32023133132023).

The spelling of 20001121022021 in words is "twenty trillion, one billion, one hundred twenty-one million, twenty-two thousand, twenty-one".