21012010010 has 16 divisors (see below), whose sum is σ = 38011680000. Its totient is φ = 8362568016.

The previous prime is 21012009971. The next prime is 21012010027. The reversal of 21012010010 is 1001021012.

It is a self number, because there is not a number n which added to its sum of digits gives 21012010010.

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, 5277410 + ... + 5281389.

It is an arithmetic number, because the mean of its divisors is an integer number (2375730000).

Almost surely, 2^21012010010 is an apocalyptic number.

21012010010 is a deficient number, since it is larger than the sum of its proper divisors (16999669990).

21012010010 is a wasteful number, since it uses less digits than its factorization.

21012010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10559005.

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

Adding to 21012010010 its reverse (1001021012), we get a palindrome (22013031022).

The spelling of 21012010010 in words is "twenty-one billion, twelve million, ten thousand, ten".