12212102101221 has 64 divisors (see below), whose sum is σ = 20197596672000. Its totient is φ = 7228481178240.

The previous prime is 12212102101163. The next prime is 12212102101237. The reversal of 12212102101221 is 12210120121221.

12212102101221 is a `hidden beast` number, since 1 + 2 + 21 + 210 + 210 + 1 + 221 = 666.

12212102101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12212102101221 - 2¹⁴ = 12212102084837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212102101194 and 12212102101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212102101421) 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, 160480660 + ... + 160556738.

It is an arithmetic number, because the mean of its divisors is an integer number (315587448000).

Almost surely, 2^{12212102101221} is an apocalyptic number.

12212102101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212102101221 is a deficient number, since it is larger than the sum of its proper divisors (7985494570779).

12212102101221 is a wasteful number, since it uses less digits than its factorization.

12212102101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88711 (or 88705 counting only the distinct ones).

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

Adding to 12212102101221 its reverse (12210120121221), we get a palindrome (24422222222442).

The spelling of 12212102101221 in words is "twelve trillion, two hundred twelve billion, one hundred two million, one hundred one thousand, two hundred twenty-one".