21100321202 has 4 divisors (see below), whose sum is σ = 31650481806. Its totient is φ = 10550160600.

The previous prime is 21100321201. The next prime is 21100321223. The reversal of 21100321202 is 20212300112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19782703801 + 1317617401 = 140651^2 + 36299^2 .

It is not an unprimeable number, because it can be changed into a prime (21100321201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275080299 + ... + 5275080302.

Almost surely, 2^21100321202 is an apocalyptic number.

21100321202 is a deficient number, since it is larger than the sum of its proper divisors (10550160604).

21100321202 is a wasteful number, since it uses less digits than its factorization.

21100321202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10550160603.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21100321202 its reverse (20212300112), we get a palindrome (41312621314).

The spelling of 21100321202 in words is "twenty-one billion, one hundred million, three hundred twenty-one thousand, two hundred two".