20002002211121 has 4 divisors (see below), whose sum is σ = 22859431098432. Its totient is φ = 17144573323812.

The previous prime is 20002002211109. The next prime is 20002002211123. The reversal of 20002002211121 is 12111220020002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20002002211121 - 2¹⁰ = 20002002210097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002002211096 and 20002002211105.

It is not an unprimeable number, because it can be changed into a prime (20002002211123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428714443645 + ... + 1428714443658.

It is an arithmetic number, because the mean of its divisors is an integer number (5714857774608).

Almost surely, 2^{20002002211121} is an apocalyptic number.

It is an amenable number.

20002002211121 is a deficient number, since it is larger than the sum of its proper divisors (2857428887311).

20002002211121 is an equidigital number, since it uses as much as digits as its factorization.

20002002211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857428887310.

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

Adding to 20002002211121 its reverse (12111220020002), we get a palindrome (32113222231123).

The spelling of 20002002211121 in words is "twenty trillion, two billion, two million, two hundred eleven thousand, one hundred twenty-one".