121231132123 has 2 divisors, whose sum is σ = 121231132124. Its totient is φ = 121231132122.

The previous prime is 121231132117. The next prime is 121231132129. The reversal of 121231132123 is 321231132121.

It is a balanced prime because it is at equal distance from previous prime (121231132117) and next prime (121231132129).

It is a cyclic number.

It is not a de Polignac number, because 121231132123 - 2⁹ = 121231131611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121231132094 and 121231132103.

It is not a weakly prime, because it can be changed into another prime (121231132129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615566061 + 60615566062.

It is an arithmetic number, because the mean of its divisors is an integer number (60615566062).

Almost surely, 2^121231132123 is an apocalyptic number.

121231132123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121231132123 is an equidigital number, since it uses as much as digits as its factorization.

121231132123 is an evil number, because the sum of its binary digits is even.

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

Adding to 121231132123 its reverse (321231132121), we get a palindrome (442462264244).

The spelling of 121231132123 in words is "one hundred twenty-one billion, two hundred thirty-one million, one hundred thirty-two thousand, one hundred twenty-three".