121323726929 has 2 divisors, whose sum is σ = 121323726930. Its totient is φ = 121323726928.

The previous prime is 121323726917. The next prime is 121323726943. The reversal of 121323726929 is 929627323121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103461939025 + 17861787904 = 321655^2 + 133648^2 .

It is a cyclic number.

It is not a de Polignac number, because 121323726929 - 2²⁸ = 121055291473 is a prime.

It is not a weakly prime, because it can be changed into another prime (121323726229) 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, 60661863464 + 60661863465.

It is an arithmetic number, because the mean of its divisors is an integer number (60661863465).

Almost surely, 2^121323726929 is an apocalyptic number.

It is an amenable number.

121323726929 is a deficient number, since it is larger than the sum of its proper divisors (1).

121323726929 is an equidigital number, since it uses as much as digits as its factorization.

121323726929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The spelling of 121323726929 in words is "one hundred twenty-one billion, three hundred twenty-three million, seven hundred twenty-six thousand, nine hundred twenty-nine".