21130202 has 8 divisors (see below), whose sum is σ = 32051700. Its totient is φ = 10446304.

The previous prime is 21130111. The next prime is 21130231. The reversal of 21130202 is 20203112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19088161 + 2042041 = 4369^2 + 1429^2 .

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

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, 59177 + ... + 59532.

Almost surely, 2^21130202 is an apocalyptic number.

21130202 is a deficient number, since it is larger than the sum of its proper divisors (10921498).

21130202 is a wasteful number, since it uses less digits than its factorization.

21130202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118800.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21130202 is about 4596.7599458749. The cubic root of 21130202 is about 276.4614296987.

Adding to 21130202 its reverse (20203112), we get a palindrome (41333314).

The spelling of 21130202 in words is "twenty-one million, one hundred thirty thousand, two hundred two".