212313115121 has 2 divisors, whose sum is σ = 212313115122. Its totient is φ = 212313115120.

The previous prime is 212313115117. The next prime is 212313115123. The reversal of 212313115121 is 121511313212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207330872896 + 4982242225 = 455336^2 + 70585^2 .

It is a cyclic number.

It is not a de Polignac number, because 212313115121 - 2² = 212313115117 is a prime.

Together with 212313115123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212313115123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106156557560 + 106156557561.

It is an arithmetic number, because the mean of its divisors is an integer number (106156557561).

Almost surely, 2^212313115121 is an apocalyptic number.

It is an amenable number.

212313115121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212313115121 is an equidigital number, since it uses as much as digits as its factorization.

212313115121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 23.

Adding to 212313115121 its reverse (121511313212), we get a palindrome (333824428333).

The spelling of 212313115121 in words is "two hundred twelve billion, three hundred thirteen million, one hundred fifteen thousand, one hundred twenty-one".