123011326729 has 2 divisors, whose sum is σ = 123011326730. Its totient is φ = 123011326728.

The previous prime is 123011326699. The next prime is 123011326769. The reversal of 123011326729 is 927623110321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67810764025 + 55200562704 = 260405^2 + 234948^2 .

It is a cyclic number.

It is not a de Polignac number, because 123011326729 - 2¹⁵ = 123011293961 is a prime.

It is not a weakly prime, because it can be changed into another prime (123011326769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61505663364 + 61505663365.

It is an arithmetic number, because the mean of its divisors is an integer number (61505663365).

Almost surely, 2^123011326729 is an apocalyptic number.

It is an amenable number.

123011326729 is a deficient number, since it is larger than the sum of its proper divisors (1).

123011326729 is an equidigital number, since it uses as much as digits as its factorization.

123011326729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 123011326729 in words is "one hundred twenty-three billion, eleven million, three hundred twenty-six thousand, seven hundred twenty-nine".