2002021020321 has 16 divisors (see below), whose sum is σ = 3050738985984. Its totient is φ = 1143996903504.

The previous prime is 2002021020319. The next prime is 2002021020331. The reversal of 2002021020321 is 1230201202002.

It is a happy number.

It is not a de Polignac number, because 2002021020321 - 2¹ = 2002021020319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2002021020321.

It is not an unprimeable number, because it can be changed into a prime (2002021020331) 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, 1110340 + ... + 2288426.

It is an arithmetic number, because the mean of its divisors is an integer number (190671186624).

Almost surely, 2^{2002021020321} is an apocalyptic number.

2002021020321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2002021020321 is a deficient number, since it is larger than the sum of its proper divisors (1048717965663).

2002021020321 is a wasteful number, since it uses less digits than its factorization.

2002021020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259020.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 2002021020321 its reverse (1230201202002), we get a palindrome (3232222222323).

The spelling of 2002021020321 in words is "two trillion, two billion, twenty-one million, twenty thousand, three hundred twenty-one".