121340423123 has 2 divisors, whose sum is σ = 121340423124. Its totient is φ = 121340423122.

The previous prime is 121340423101. The next prime is 121340423131. The reversal of 121340423123 is 321324043121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121340423123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121340423092 and 121340423101.

It is not a weakly prime, because it can be changed into another prime (121340423173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670211561 + 60670211562.

It is an arithmetic number, because the mean of its divisors is an integer number (60670211562).

Almost surely, 2^121340423123 is an apocalyptic number.

121340423123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340423123 is an equidigital number, since it uses as much as digits as its factorization.

121340423123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 121340423123 its reverse (321324043121), we get a palindrome (442664466244).

The spelling of 121340423123 in words is "one hundred twenty-one billion, three hundred forty million, four hundred twenty-three thousand, one hundred twenty-three".