213223113121 has 2 divisors, whose sum is σ = 213223113122. Its totient is φ = 213223113120.

The previous prime is 213223113097. The next prime is 213223113127. The reversal of 213223113121 is 121311322312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211196312721 + 2026800400 = 459561^2 + 45020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213223113121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213223113092 and 213223113101.

It is not a weakly prime, because it can be changed into another prime (213223113127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106611556560 + 106611556561.

It is an arithmetic number, because the mean of its divisors is an integer number (106611556561).

Almost surely, 2^213223113121 is an apocalyptic number.

It is an amenable number.

213223113121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213223113121 is an equidigital number, since it uses as much as digits as its factorization.

213223113121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

Adding to 213223113121 its reverse (121311322312), we get a palindrome (334534435433).

The spelling of 213223113121 in words is "two hundred thirteen billion, two hundred twenty-three million, one hundred thirteen thousand, one hundred twenty-one".