21021012200202 has 16 divisors (see below), whose sum is σ = 48048027886272. Its totient is φ = 6006003485760.

The previous prime is 21021012200189. The next prime is 21021012200203. The reversal of 21021012200202 is 20200221012012.

It is not an unprimeable number, because it can be changed into a prime (21021012200203) by changing a digit.

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, 250250145199 + ... + 250250145282.

It is an arithmetic number, because the mean of its divisors is an integer number (3003001742892).

Almost surely, 2^{21021012200202} is an apocalyptic number.

21021012200202 is an abundant number, since it is smaller than the sum of its proper divisors (27027015686070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021012200202 is a wasteful number, since it uses less digits than its factorization.

21021012200202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500500290493.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21021012200202 its reverse (20200221012012), we get a palindrome (41221233212214).

The spelling of 21021012200202 in words is "twenty-one trillion, twenty-one billion, twelve million, two hundred thousand, two hundred two".