20002001121221 has 8 divisors (see below), whose sum is σ = 23181393654144. Its totient is φ = 16903099538640.

The previous prime is 20002001121163. The next prime is 20002001121247. The reversal of 20002001121221 is 12212110020002.

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

It is not a de Polignac number, because 20002001121221 - 2³⁴ = 19984821252037 is a prime.

It is a super-2 number, since 2×20002001121221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002001121196 and 20002001121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002001121721) 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, 20122737050 + ... + 20122738043.

It is an arithmetic number, because the mean of its divisors is an integer number (2897674206768).

Almost surely, 2^{20002001121221} is an apocalyptic number.

It is an amenable number.

20002001121221 is a deficient number, since it is larger than the sum of its proper divisors (3179392532923).

20002001121221 is an equidigital number, since it uses as much as digits as its factorization.

20002001121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40245475171.

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

Adding to 20002001121221 its reverse (12212110020002), we get a palindrome (32214111141223).

The spelling of 20002001121221 in words is "twenty trillion, two billion, one million, one hundred twenty-one thousand, two hundred twenty-one".