21213313202 has 4 divisors (see below), whose sum is σ = 31819969806. Its totient is φ = 10606656600.

The previous prime is 21213313171. The next prime is 21213313207. The reversal of 21213313202 is 20231331212.

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., 21083330401 + 129982801 = 145201^2 + 11401^2 .

It is a super-2 number, since 2×21213313202² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21213313207) by changing a digit.

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, 5303328299 + ... + 5303328302.

Almost surely, 2^21213313202 is an apocalyptic number.

21213313202 is a deficient number, since it is larger than the sum of its proper divisors (10606656604).

21213313202 is a wasteful number, since it uses less digits than its factorization.

21213313202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10606656603.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21213313202 its reverse (20231331212), we get a palindrome (41444644414).

The spelling of 21213313202 in words is "twenty-one billion, two hundred thirteen million, three hundred thirteen thousand, two hundred two".