21031210010 has 32 divisors (see below), whose sum is σ = 39859983360. Its totient is φ = 7967446848.

The previous prime is 21031210003. The next prime is 21031210021. The reversal of 21031210010 is 1001213012.

It is a junction number, because it is equal to n+sod(n) for n = 21031209973 and 21031210000.

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 15 ways as a sum of consecutive naturals, for example, 748679 + ... + 776261.

It is an arithmetic number, because the mean of its divisors is an integer number (1245624480).

Almost surely, 2^21031210010 is an apocalyptic number.

21031210010 is a deficient number, since it is larger than the sum of its proper divisors (18828773350).

21031210010 is a wasteful number, since it uses less digits than its factorization.

21031210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31622.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21031210010 its reverse (1001213012), we get a palindrome (22032423022).

The spelling of 21031210010 in words is "twenty-one billion, thirty-one million, two hundred ten thousand, ten".