21210010010 has 32 divisors (see below), whose sum is σ = 43685937792. Its totient is φ = 7263017280.

The previous prime is 21210009959. The next prime is 21210010039. The reversal of 21210010010 is 1001001212.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21210010010.

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, 130037 + ... + 243576.

It is an arithmetic number, because the mean of its divisors is an integer number (1365185556).

Almost surely, 2^21210010010 is an apocalyptic number.

21210010010 is an abundant number, since it is smaller than the sum of its proper divisors (22475927782).

21210010010 is a wasteful number, since it uses less digits than its factorization.

21210010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374438.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21210010010 its reverse (1001001212), we get a palindrome (22211011222).

The spelling of 21210010010 in words is "twenty-one billion, two hundred ten million, ten thousand, ten".