21190102 has 8 divisors (see below), whose sum is σ = 31824576. Its totient is φ = 10581912.

The previous prime is 21190093. The next prime is 21190123. The reversal of 21190102 is 20109112.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4413 + ... + 7864.

It is an arithmetic number, because the mean of its divisors is an integer number (3978072).

Almost surely, 2^21190102 is an apocalyptic number.

21190102 is a deficient number, since it is larger than the sum of its proper divisors (10634474).

21190102 is a wasteful number, since it uses less digits than its factorization.

21190102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13142.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 21190102 is about 4603.2707936857. The cubic root of 21190102 is about 276.7224213048.

Adding to 21190102 its reverse (20109112), we get a palindrome (41299214).

The spelling of 21190102 in words is "twenty-one million, one hundred ninety thousand, one hundred two".