21102202 has 24 divisors (see below), whose sum is σ = 36692640. Its totient is φ = 9024960.

The previous prime is 21102199. The next prime is 21102209. The reversal of 21102202 is 20220112.

It is not an unprimeable number, because it can be changed into a prime (21102209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4699 + ... + 8017.

It is an arithmetic number, because the mean of its divisors is an integer number (1528860).

Almost surely, 2^21102202 is an apocalyptic number.

21102202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21102202 is a deficient number, since it is larger than the sum of its proper divisors (15590438).

21102202 is a wasteful number, since it uses less digits than its factorization.

21102202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366 (or 3349 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 21102202 is about 4593.7133127787. The cubic root of 21102202 is about 276.3392610959.

Adding to 21102202 its reverse (20220112), we get a palindrome (41322314).

The spelling of 21102202 in words is "twenty-one million, one hundred two thousand, two hundred two".