21312010010 has 16 divisors (see below), whose sum is σ = 38522131200. Its totient is φ = 8489134416.

The previous prime is 21312009997. The next prime is 21312010021. The reversal of 21312010010 is 1001021312.

It is a junction number, because it is equal to n+sod(n) for n = 21312009973 and 21312010000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4456190 + ... + 4460969.

It is an arithmetic number, because the mean of its divisors is an integer number (2407633200).

Almost surely, 2^21312010010 is an apocalyptic number.

21312010010 is a deficient number, since it is larger than the sum of its proper divisors (17210121190).

21312010010 is a wasteful number, since it uses less digits than its factorization.

21312010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8917405.

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

Adding to 21312010010 its reverse (1001021312), we get a palindrome (22313031322).

The spelling of 21312010010 in words is "twenty-one billion, three hundred twelve million, ten thousand, ten".