212232123121 has 2 divisors, whose sum is σ = 212232123122. Its totient is φ = 212232123120.

The previous prime is 212232123097. The next prime is 212232123137. The reversal of 212232123121 is 121321232212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139494033121 + 72738090000 = 373489^2 + 269700^2 .

It is a cyclic number.

It is not a de Polignac number, because 212232123121 - 2¹⁹ = 212231598833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212232123092 and 212232123101.

It is not a weakly prime, because it can be changed into another prime (212232123221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106116061560 + 106116061561.

It is an arithmetic number, because the mean of its divisors is an integer number (106116061561).

Almost surely, 2^212232123121 is an apocalyptic number.

It is an amenable number.

212232123121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212232123121 is an equidigital number, since it uses as much as digits as its factorization.

212232123121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 212232123121 its reverse (121321232212), we get a palindrome (333553355333).

The spelling of 212232123121 in words is "two hundred twelve billion, two hundred thirty-two million, one hundred twenty-three thousand, one hundred twenty-one".