2002020021221 has 8 divisors (see below), whose sum is σ = 2187397462464. Its totient is φ = 1817205183520.

The previous prime is 2002020021203. The next prime is 2002020021233. The reversal of 2002020021221 is 1221200202002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002020021221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002020021196 and 2002020021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002020021271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140643440 + ... + 140657673.

It is an arithmetic number, because the mean of its divisors is an integer number (273424682808).

Almost surely, 2^{2002020021221} is an apocalyptic number.

It is an amenable number.

2002020021221 is a deficient number, since it is larger than the sum of its proper divisors (185377441243).

2002020021221 is a wasteful number, since it uses less digits than its factorization.

2002020021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281301771.

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

Adding to 2002020021221 its reverse (1221200202002), we get a palindrome (3223220223223).

It can be divided in two parts, 200202002 and 1221, that multiplied together give a palindrome (244446644442).

The spelling of 2002020021221 in words is "two trillion, two billion, twenty million, twenty-one thousand, two hundred twenty-one".