201221202002 has 16 divisors (see below), whose sum is σ = 312252663960. Its totient is φ = 97137266688.

The previous prime is 201221201983. The next prime is 201221202043. The reversal of 201221202002 is 200202122102.

It can be written as a sum of positive squares in 4 ways, for example, as 179293811761 + 21927390241 = 423431^2 + 148079^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1740668 + ... + 1852664.

Almost surely, 2^201221202002 is an apocalyptic number.

201221202002 is a deficient number, since it is larger than the sum of its proper divisors (111031461958).

201221202002 is a wasteful number, since it uses less digits than its factorization.

201221202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143005.

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

Adding to 201221202002 its reverse (200202122102), we get a palindrome (401423324104).

The spelling of 201221202002 in words is "two hundred one billion, two hundred twenty-one million, two hundred two thousand, two".