12010211212221 has 12 divisors (see below), whose sum is σ = 17816949966972. Its totient is φ = 7790407272576.

The previous prime is 12010211212201. The next prime is 12010211212231. The reversal of 12010211212221 is 12221211201021.

12010211212221 is a `hidden beast` number, since 1 + 20 + 1 + 0 + 211 + 212 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8593610168196 + 3416601044025 = 2931486^2 + 1848405^2 .

It is not a de Polignac number, because 12010211212221 - 2¹⁵ = 12010211179453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12010211212194 and 12010211212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010211212201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18033349836 + ... + 18033350501.

It is an arithmetic number, because the mean of its divisors is an integer number (1484745830581).

Almost surely, 2^{12010211212221} is an apocalyptic number.

It is an amenable number.

12010211212221 is a deficient number, since it is larger than the sum of its proper divisors (5806738754751).

12010211212221 is a wasteful number, since it uses less digits than its factorization.

12010211212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36066700380 (or 36066700377 counting only the distinct ones).

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

Adding to 12010211212221 its reverse (12221211201021), we get a palindrome (24231422413242).

The spelling of 12010211212221 in words is "twelve trillion, ten billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-one".