21211210010 has 16 divisors (see below), whose sum is σ = 38191252896. Its totient is φ = 8482022928.

The previous prime is 21211209997. The next prime is 21211210021. The reversal of 21211210010 is 1001211212.

It is a junction number, because it is equal to n+sod(n) for n = 21211209973 and 21211210000.

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, 271232 + ... + 340571.

It is an arithmetic number, because the mean of its divisors is an integer number (2386953306).

Almost surely, 2^21211210010 is an apocalyptic number.

21211210010 is a deficient number, since it is larger than the sum of its proper divisors (16980042886).

21211210010 is a wasteful number, since it uses less digits than its factorization.

21211210010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615277.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21211210010 its reverse (1001211212), we get a palindrome (22212421222).

The spelling of 21211210010 in words is "twenty-one billion, two hundred eleven million, two hundred ten thousand, ten".