21320313202 has 4 divisors (see below), whose sum is σ = 31980469806. Its totient is φ = 10660156600.

The previous prime is 21320313187. The next prime is 21320313211. The reversal of 21320313202 is 20231302312.

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., 20626991641 + 693321561 = 143621^2 + 26331^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21320313202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330078299 + ... + 5330078302.

Almost surely, 2^21320313202 is an apocalyptic number.

21320313202 is a deficient number, since it is larger than the sum of its proper divisors (10660156604).

21320313202 is a wasteful number, since it uses less digits than its factorization.

21320313202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660156603.

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

Adding to 21320313202 its reverse (20231302312), we get a palindrome (41551615514).

The spelling of 21320313202 in words is "twenty-one billion, three hundred twenty million, three hundred thirteen thousand, two hundred two".