21120202 has 8 divisors (see below), whose sum is σ = 32354496. Its totient is φ = 10335372.

The previous prime is 21120193. The next prime is 21120223. The reversal of 21120202 is 20202112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112248 + ... + 112435.

It is an arithmetic number, because the mean of its divisors is an integer number (4044312).

Almost surely, 2^21120202 is an apocalyptic number.

21120202 is a deficient number, since it is larger than the sum of its proper divisors (11234294).

21120202 is a wasteful number, since it uses less digits than its factorization.

21120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224732.

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

The square root of 21120202 is about 4595.6720944819. The cubic root of 21120202 is about 276.4178104511.

Adding to 21120202 its reverse (20202112), we get a palindrome (41322314).

The spelling of 21120202 in words is "twenty-one million, one hundred twenty thousand, two hundred two".