12213000134221 has 2 divisors, whose sum is σ = 12213000134222. Its totient is φ = 12213000134220.

The previous prime is 12213000134143. The next prime is 12213000134243. The reversal of 12213000134221 is 12243100031221.

It is an a-pointer prime, because the next prime (12213000134243) can be obtained adding 12213000134221 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11261427198025 + 951572936196 = 3355805^2 + 975486^2 .

It is an emirp because it is prime and its reverse (12243100031221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12213000134221 - 2¹¹ = 12213000132173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12213000134192 and 12213000134201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12213000134261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106500067110 + 6106500067111.

It is an arithmetic number, because the mean of its divisors is an integer number (6106500067111).

Almost surely, 2^{12213000134221} is an apocalyptic number.

It is an amenable number.

12213000134221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12213000134221 is an equidigital number, since it uses as much as digits as its factorization.

12213000134221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 12213000134221 its reverse (12243100031221), we get a palindrome (24456100165442).

The spelling of 12213000134221 in words is "twelve trillion, two hundred thirteen billion, one hundred thirty-four thousand, two hundred twenty-one".