21001001202202 has 16 divisors (see below), whose sum is σ = 36002018665152. Its totient is φ = 9000353507040.

The previous prime is 21001001202151. The next prime is 21001001202241. The reversal of 21001001202202 is 20220210010012.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4554924 + ... + 7921447.

It is an arithmetic number, because the mean of its divisors is an integer number (2250126166572).

Almost surely, 2^{21001001202202} is an apocalyptic number.

21001001202202 is a deficient number, since it is larger than the sum of its proper divisors (15001017462950).

21001001202202 is a wasteful number, since it uses less digits than its factorization.

21001001202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12596613.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21001001202202 its reverse (20220210010012), we get a palindrome (41221211212214).

The spelling of 21001001202202 in words is "twenty-one trillion, one billion, one million, two hundred two thousand, two hundred two".