12010212112221 has 64 divisors (see below), whose sum is σ = 19377899520000. Its totient is φ = 7322817410496.

The previous prime is 12010212112139. The next prime is 12010212112253. The reversal of 12010212112221 is 12221121201021.

12010212112221 is a `hidden beast` number, since 120 + 1 + 0 + 212 + 112 + 221 = 666.

It is not a de Polignac number, because 12010212112221 - 2¹⁰ = 12010212111197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12010212112194 and 12010212112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010212112421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115378620 + ... + 115482666.

It is an arithmetic number, because the mean of its divisors is an integer number (302779680000).

Almost surely, 2^{12010212112221} is an apocalyptic number.

It is an amenable number.

12010212112221 is a deficient number, since it is larger than the sum of its proper divisors (7367687407779).

12010212112221 is a wasteful number, since it uses less digits than its factorization.

12010212112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111863 (or 111857 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12010212112221 its reverse (12221121201021), we get a palindrome (24231333313242).

The spelling of 12010212112221 in words is "twelve trillion, ten billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty-one".