21110201210 has 32 divisors (see below), whose sum is σ = 44074869120. Its totient is φ = 7129755072.

The previous prime is 21110201209. The next prime is 21110201213. The reversal of 21110201210 is 1210201112.

It is a junction number, because it is equal to n+sod(n) for n = 21110201191 and 21110201200.

It is not an unprimeable number, because it can be changed into a prime (21110201213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2245865 + ... + 2255244.

It is an arithmetic number, because the mean of its divisors is an integer number (1377339660).

Almost surely, 2^21110201210 is an apocalyptic number.

21110201210 is an abundant number, since it is smaller than the sum of its proper divisors (22964667910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110201210 is a wasteful number, since it uses less digits than its factorization.

21110201210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501190.

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

Adding to 21110201210 its reverse (1210201112), we get a palindrome (22320402322).

The spelling of 21110201210 in words is "twenty-one billion, one hundred ten million, two hundred one thousand, two hundred ten".