21201032210 has 16 divisors (see below), whose sum is σ = 38539699992. Its totient is φ = 8396448000.

The previous prime is 21201032191. The next prime is 21201032317. The reversal of 21201032210 is 1223010212.

It is a happy number.

21201032210 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19163141761 + 2037890449 = 138431^2 + 45143^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 10494551 + ... + 10496570.

Almost surely, 2^21201032210 is an apocalyptic number.

21201032210 is a deficient number, since it is larger than the sum of its proper divisors (17338667782).

21201032210 is a wasteful number, since it uses less digits than its factorization.

21201032210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20991229.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21201032210 its reverse (1223010212), we get a palindrome (22424042422).

The spelling of 21201032210 in words is "twenty-one billion, two hundred one million, thirty-two thousand, two hundred ten".