123132231121 has 2 divisors, whose sum is σ = 123132231122. Its totient is φ = 123132231120.

The previous prime is 123132231119. The next prime is 123132231133. The reversal of 123132231121 is 121132231321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120700656400 + 2431574721 = 347420^2 + 49311^2 .

It is a cyclic number.

It is not a de Polignac number, because 123132231121 - 2¹ = 123132231119 is a prime.

Together with 123132231119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 123132231092 and 123132231101.

It is not a weakly prime, because it can be changed into another prime (123132231151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61566115560 + 61566115561.

It is an arithmetic number, because the mean of its divisors is an integer number (61566115561).

Almost surely, 2^123132231121 is an apocalyptic number.

It is an amenable number.

123132231121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123132231121 is an equidigital number, since it uses as much as digits as its factorization.

123132231121 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 123132231121 its reverse (121132231321), we get a palindrome (244264462442).

The spelling of 123132231121 in words is "one hundred twenty-three billion, one hundred thirty-two million, two hundred thirty-one thousand, one hundred twenty-one".