21212001102110 has 64 divisors (see below), whose sum is σ = 47011856371200. Its totient is φ = 6710517919872.

The previous prime is 21212001102043. The next prime is 21212001102151. The reversal of 21212001102110 is 1120110021212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2502020 + ... + 6977399.

It is an arithmetic number, because the mean of its divisors is an integer number (734560255800).

Almost surely, 2^{21212001102110} is an apocalyptic number.

21212001102110 is an abundant number, since it is smaller than the sum of its proper divisors (25799855269090).

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

21212001102110 is a wasteful number, since it uses less digits than its factorization.

21212001102110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9481905.

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

Adding to 21212001102110 its reverse (1120110021212), we get a palindrome (22332111123322).

The spelling of 21212001102110 in words is "twenty-one trillion, two hundred twelve billion, one million, one hundred two thousand, one hundred ten".