2002122020021 has 16 divisors (see below), whose sum is σ = 2176300492800. Its totient is φ = 1834870028400.

The previous prime is 2002122019973. The next prime is 2002122020047. The reversal of 2002122020021 is 1200202212002.

It is a cyclic number.

It is not a de Polignac number, because 2002122020021 - 2³⁰ = 2001048278197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2002122019978 and 2002122020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002122020051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926966 + ... + 2205336.

It is an arithmetic number, because the mean of its divisors is an integer number (136018780800).

Almost surely, 2^{2002122020021} is an apocalyptic number.

It is an amenable number.

2002122020021 is a deficient number, since it is larger than the sum of its proper divisors (174178472779).

2002122020021 is a wasteful number, since it uses less digits than its factorization.

2002122020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281080.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2002122020021 its reverse (1200202212002), we get a palindrome (3202324232023).

The spelling of 2002122020021 in words is "two trillion, two billion, one hundred twenty-two million, twenty thousand, twenty-one".