21202110202 has 32 divisors (see below), whose sum is σ = 39726594432. Its totient is φ = 8262454464.

The previous prime is 21202110191. The next prime is 21202110211. The reversal of 21202110202 is 20201120212.

It is a happy number.

It is a super-3 number, since 3×21202110202³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

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 15 ways as a sum of consecutive naturals, for example, 857173 + ... + 881560.

It is an arithmetic number, because the mean of its divisors is an integer number (1241456076).

Almost surely, 2^21202110202 is an apocalyptic number.

21202110202 is a deficient number, since it is larger than the sum of its proper divisors (18524484230).

21202110202 is a wasteful number, since it uses less digits than its factorization.

21202110202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738822.

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

Adding to 21202110202 its reverse (20201120212), we get a palindrome (41403230414).

The spelling of 21202110202 in words is "twenty-one billion, two hundred two million, one hundred ten thousand, two hundred two".