12210001110221 has 8 divisors (see below), whose sum is σ = 12213841825080. Its totient is φ = 12206160904192.

The previous prime is 12210001110211. The next prime is 12210001110269. The reversal of 12210001110221 is 12201110001221.

It can be written as a sum of positive squares in 4 ways, for example, as 7337434912900 + 4872566197321 = 2708770^2 + 2207389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12210001110221 - 2⁴² = 7811954599117 is a prime.

It is a super-2 number, since 2×12210001110221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12210001110196 and 12210001110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210001110211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51069485 + ... + 51308013.

It is an arithmetic number, because the mean of its divisors is an integer number (1526730228135).

Almost surely, 2^{12210001110221} is an apocalyptic number.

It is an amenable number.

12210001110221 is a deficient number, since it is larger than the sum of its proper divisors (3840714859).

12210001110221 is a wasteful number, since it uses less digits than its factorization.

12210001110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254415.

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

Adding to 12210001110221 its reverse (12201110001221), we get a palindrome (24411111111442).

The spelling of 12210001110221 in words is "twelve trillion, two hundred ten billion, one million, one hundred ten thousand, two hundred twenty-one".