21310233202 has 4 divisors (see below), whose sum is σ = 31965349806. Its totient is φ = 10655116600.

The previous prime is 21310233181. The next prime is 21310233233. The reversal of 21310233202 is 20233201312.

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

It can be written as a sum of positive squares in only one way, i.e., 12338544241 + 8971688961 = 111079^2 + 94719^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21310233202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5327558299 + ... + 5327558302.

Almost surely, 2^21310233202 is an apocalyptic number.

21310233202 is a deficient number, since it is larger than the sum of its proper divisors (10655116604).

21310233202 is a wasteful number, since it uses less digits than its factorization.

21310233202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655116603.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21310233202 its reverse (20233201312), we get a palindrome (41543434514).

The spelling of 21310233202 in words is "twenty-one billion, three hundred ten million, two hundred thirty-three thousand, two hundred two".