21001100020202 has 8 divisors (see below), whose sum is σ = 31502350653312. Its totient is φ = 10500316469100.

The previous prime is 21001100020157. The next prime is 21001100020217. The reversal of 21001100020202 is 20202000110012.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 116658074 + ... + 116837957.

It is an arithmetic number, because the mean of its divisors is an integer number (3937793831664).

Almost surely, 2^{21001100020202} is an apocalyptic number.

21001100020202 is a deficient number, since it is larger than the sum of its proper divisors (10501250633110).

21001100020202 is a wasteful number, since it uses less digits than its factorization.

21001100020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233541004.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21001100020202 its reverse (20202000110012), we get a palindrome (41203100130214).

The spelling of 21001100020202 in words is "twenty-one trillion, one billion, one hundred million, twenty thousand, two hundred two".