221220102002002 has 8 divisors (see below), whose sum is σ = 335558581688700. Its totient is φ = 109367241439104.

The previous prime is 221220102001999. The next prime is 221220102002069. The reversal of 221220102002002 is 200200201022122.

It can be written as a sum of positive squares in 2 ways, for example, as 220963497955281 + 256604046721 = 14864841^2 + 506561^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621404780727 + ... + 621404781082.

Almost surely, 2^{221220102002002} is an apocalyptic number.

221220102002002 is a deficient number, since it is larger than the sum of its proper divisors (114338479686698).

221220102002002 is a wasteful number, since it uses less digits than its factorization.

221220102002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242809561900.

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

Adding to 221220102002002 its reverse (200200201022122), we get a palindrome (421420303024124).

The spelling of 221220102002002 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred two million, two thousand, two".