21163313503202 has 32 divisors (see below), whose sum is σ = 36198680943600. Its totient is φ = 9192911321088.

The previous prime is 21163313503193. The next prime is 21163313503279. The reversal of 21163313503202 is 20230531336112.

It can be written as a sum of positive squares in 8 ways, for example, as 11155005487921 + 10008308015281 = 3339911^2 + 3163591^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20540324 + ... + 21546032.

Almost surely, 2^{21163313503202} is an apocalyptic number.

21163313503202 is a deficient number, since it is larger than the sum of its proper divisors (15035367440398).

21163313503202 is a wasteful number, since it uses less digits than its factorization.

21163313503202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053350.

The product of its (nonzero) digits is 19440, while the sum is 32.

Adding to 21163313503202 its reverse (20230531336112), we get a palindrome (41393844839314).

The spelling of 21163313503202 in words is "twenty-one trillion, one hundred sixty-three billion, three hundred thirteen million, five hundred three thousand, two hundred two".