21210132302 has 4 divisors (see below), whose sum is σ = 31815198456. Its totient is φ = 10605066150.

The previous prime is 21210132299. The next prime is 21210132343. The reversal of 21210132302 is 20323101212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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, 5302533074 + ... + 5302533077.

It is an arithmetic number, because the mean of its divisors is an integer number (7953799614).

Almost surely, 2^21210132302 is an apocalyptic number.

21210132302 is a deficient number, since it is larger than the sum of its proper divisors (10605066154).

21210132302 is a wasteful number, since it uses less digits than its factorization.

21210132302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605066153.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21210132302 its reverse (20323101212), we get a palindrome (41533233514).

The spelling of 21210132302 in words is "twenty-one billion, two hundred ten million, one hundred thirty-two thousand, three hundred two".