2002020021121 has 4 divisors (see below), whose sum is σ = 2003924893744. Its totient is φ = 2000115148500.

The previous prime is 2002020021061. The next prime is 2002020021151. The reversal of 2002020021121 is 1211200202002.

It is a happy number.

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 2002020021121 - 2²⁹ = 2001483150209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002020021151) 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, 952434735 + ... + 952436836.

It is an arithmetic number, because the mean of its divisors is an integer number (500981223436).

Almost surely, 2^{2002020021121} is an apocalyptic number.

It is an amenable number.

2002020021121 is a deficient number, since it is larger than the sum of its proper divisors (1904872623).

2002020021121 is a wasteful number, since it uses less digits than its factorization.

2002020021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904872622.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2002020021121 its reverse (1211200202002), we get a palindrome (3213220223123).

The spelling of 2002020021121 in words is "two trillion, two billion, twenty million, twenty-one thousand, one hundred twenty-one".