21022110202 has 4 divisors (see below), whose sum is σ = 31533165306. Its totient is φ = 10511055100.

The previous prime is 21022110199. The next prime is 21022110211. The reversal of 21022110202 is 20201122012.

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., 14869119721 + 6152990481 = 121939^2 + 78441^2 .

It is an unprimeable number.

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, 5255527549 + ... + 5255527552.

Almost surely, 2^21022110202 is an apocalyptic number.

21022110202 is a deficient number, since it is larger than the sum of its proper divisors (10511055104).

21022110202 is a wasteful number, since it uses less digits than its factorization.

21022110202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511055103.

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

Adding to 21022110202 its reverse (20201122012), we get a palindrome (41223232214).

The spelling of 21022110202 in words is "twenty-one billion, twenty-two million, one hundred ten thousand, two hundred two".