2002201221221 has 8 divisors (see below), whose sum is σ = 2036161649760. Its totient is φ = 1968241619952.

The previous prime is 2002201221211. The next prime is 2002201221233. The reversal of 2002201221221 is 1221221022002.

It is a happy number.

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-2002201221221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2002201221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002201221211) 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, 6507371 + ... + 6808103.

It is an arithmetic number, because the mean of its divisors is an integer number (254520206220).

Almost surely, 2^{2002201221221} is an apocalyptic number.

It is an amenable number.

2002201221221 is a deficient number, since it is larger than the sum of its proper divisors (33960428539).

2002201221221 is a wasteful number, since it uses less digits than its factorization.

2002201221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413635.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2002201221221 its reverse (1221221022002), we get a palindrome (3223422243223).

The spelling of 2002201221221 in words is "two trillion, two billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-one".