21201210010 has 16 divisors (see below), whose sum is σ = 38168361216. Its totient is φ = 8479109968.

The previous prime is 21201210007. The next prime is 21201210047. The reversal of 21201210010 is 1001210212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105742 + ... + 231481.

It is an arithmetic number, because the mean of its divisors is an integer number (2385522576).

Almost surely, 2^21201210010 is an apocalyptic number.

21201210010 is a deficient number, since it is larger than the sum of its proper divisors (16967151206).

21201210010 is a wasteful number, since it uses less digits than its factorization.

21201210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343517.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21201210010 its reverse (1001210212), we get a palindrome (22202420222).

The spelling of 21201210010 in words is "twenty-one billion, two hundred one million, two hundred ten thousand, ten".