2213223123121 has 2 divisors, whose sum is σ = 2213223123122. Its totient is φ = 2213223123120.

The previous prime is 2213223123119. The next prime is 2213223123161. The reversal of 2213223123121 is 1213213223122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2149434549025 + 63788574096 = 1466095^2 + 252564^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213223123121 - 2¹ = 2213223123119 is a prime.

Together with 2213223123119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2213223123161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106611561560 + 1106611561561.

It is an arithmetic number, because the mean of its divisors is an integer number (1106611561561).

Almost surely, 2^{2213223123121} is an apocalyptic number.

It is an amenable number.

2213223123121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213223123121 is an equidigital number, since it uses as much as digits as its factorization.

2213223123121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

Adding to 2213223123121 its reverse (1213213223122), we get a palindrome (3426436346243).

The spelling of 2213223123121 in words is "two trillion, two hundred thirteen billion, two hundred twenty-three million, one hundred twenty-three thousand, one hundred twenty-one".