231222310222121 has 2 divisors, whose sum is σ = 231222310222122. Its totient is φ = 231222310222120.

The previous prime is 231222310222081. The next prime is 231222310222151. The reversal of 231222310222121 is 121222013222132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214995914982121 + 16226395240000 = 14662739^2 + 4028200^2 .

It is a cyclic number.

It is not a de Polignac number, because 231222310222121 - 2³⁸ = 230947432315177 is a prime.

It is a super-2 number, since 2×231222310222121² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231222310222151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115611155111060 + 115611155111061.

It is an arithmetic number, because the mean of its divisors is an integer number (115611155111061).

Almost surely, 2^{231222310222121} is an apocalyptic number.

It is an amenable number.

231222310222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

231222310222121 is an equidigital number, since it uses as much as digits as its factorization.

231222310222121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 231222310222121 its reverse (121222013222132), we get a palindrome (352444323444253).

The spelling of 231222310222121 in words is "two hundred thirty-one trillion, two hundred twenty-two billion, three hundred ten million, two hundred twenty-two thousand, one hundred twenty-one".