21001112210210 has 16 divisors (see below), whose sum is σ = 41238547612992. Its totient is φ = 7636768076400.

The previous prime is 21001112210159. The next prime is 21001112210251. The reversal of 21001112210210 is 1201221110012.

It is a Curzon number.

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, 95459600846 + ... + 95459601065.

It is an arithmetic number, because the mean of its divisors is an integer number (2577409225812).

Almost surely, 2^{21001112210210} is an apocalyptic number.

21001112210210 is a deficient number, since it is larger than the sum of its proper divisors (20237435402782).

21001112210210 is a wasteful number, since it uses less digits than its factorization.

21001112210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190919201929.

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

Adding to 21001112210210 its reverse (1201221110012), we get a palindrome (22202333320222).

The spelling of 21001112210210 in words is "twenty-one trillion, one billion, one hundred twelve million, two hundred ten thousand, two hundred ten".