21112002110221 has 48 divisors (see below), whose sum is σ = 24545015953920. Its totient is φ = 18001177983360.

The previous prime is 21112002110209. The next prime is 21112002110233. The reversal of 21112002110221 is 12201120021112.

It is an interprime number because it is at equal distance from previous prime (21112002110209) and next prime (21112002110233).

It is not a de Polignac number, because 21112002110221 - 2¹¹ = 21112002108173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21112002110195 and 21112002110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112002110281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 542468455 + ... + 542507371.

It is an arithmetic number, because the mean of its divisors is an integer number (511354499040).

Almost surely, 2^{21112002110221} is an apocalyptic number.

It is an amenable number.

21112002110221 is a deficient number, since it is larger than the sum of its proper divisors (3433013843699).

21112002110221 is a wasteful number, since it uses less digits than its factorization.

21112002110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40786 (or 40763 counting only the distinct ones).

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

Adding to 21112002110221 its reverse (12201120021112), we get a palindrome (33313122131333).

The spelling of 21112002110221 in words is "twenty-one trillion, one hundred twelve billion, two million, one hundred ten thousand, two hundred twenty-one".