21010112212201 has 24 divisors (see below), whose sum is σ = 24627902723424. Its totient is φ = 17870470712640.

The previous prime is 21010112212147. The next prime is 21010112212253. The reversal of 21010112212201 is 10221221101012.

It is not a de Polignac number, because 21010112212201 - 2¹⁹ = 21010111687913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010112212291) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 209228461 + ... + 209328853.

It is an arithmetic number, because the mean of its divisors is an integer number (1026162613476).

Almost surely, 2^{21010112212201} is an apocalyptic number.

It is an amenable number.

21010112212201 is a deficient number, since it is larger than the sum of its proper divisors (3617790511223).

21010112212201 is a wasteful number, since it uses less digits than its factorization.

21010112212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133141 (or 133134 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21010112212201 its reverse (10221221101012), we get a palindrome (31231333313213).

The spelling of 21010112212201 in words is "twenty-one trillion, ten billion, one hundred twelve million, two hundred twelve thousand, two hundred one".