2002120222021 has 4 divisors (see below), whose sum is σ = 2066704745344. Its totient is φ = 1937535698700.

The previous prime is 2002120221917. The next prime is 2002120222031. The reversal of 2002120222021 is 1202220212002.

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 2002120222021 - 2¹³ = 2002120213829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002120221986 and 2002120222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002120222031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32292261615 + ... + 32292261676.

It is an arithmetic number, because the mean of its divisors is an integer number (516676186336).

Almost surely, 2^{2002120222021} is an apocalyptic number.

It is an amenable number.

2002120222021 is a deficient number, since it is larger than the sum of its proper divisors (64584523323).

2002120222021 is an equidigital number, since it uses as much as digits as its factorization.

2002120222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64584523322.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2002120222021 its reverse (1202220212002), we get a palindrome (3204340434023).

It can be divided in two parts, 2002 and 120222021, that multiplied together give a palindrome (240684486042).

The spelling of 2002120222021 in words is "two trillion, two billion, one hundred twenty million, two hundred twenty-two thousand, twenty-one".