21211210210010 has 48 divisors (see below), whose sum is σ = 39913623257760. Its totient is φ = 8115336688800.

The previous prime is 21211210209997. The next prime is 21211210210013. The reversal of 21211210210010 is 1001201211212.

It is not an unprimeable number, because it can be changed into a prime (21211210210013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315520181 + ... + 315587399.

It is an arithmetic number, because the mean of its divisors is an integer number (831533817870).

Almost surely, 2^{21211210210010} is an apocalyptic number.

21211210210010 is a deficient number, since it is larger than the sum of its proper divisors (18702413047750).

21211210210010 is a wasteful number, since it uses less digits than its factorization.

21211210210010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126923 (or 126900 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21211210210010 its reverse (1001201211212), we get a palindrome (22212411421222).

The spelling of 21211210210010 in words is "twenty-one trillion, two hundred eleven billion, two hundred ten million, two hundred ten thousand, ten".