123012029977 has 2 divisors, whose sum is σ = 123012029978. Its totient is φ = 123012029976.

The previous prime is 123012029953. The next prime is 123012030061. The reversal of 123012029977 is 779920210321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75688813456 + 47323216521 = 275116^2 + 217539^2 .

It is a cyclic number.

It is not a de Polignac number, because 123012029977 - 2⁷ = 123012029849 is a prime.

It is not a weakly prime, because it can be changed into another prime (123012029177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506014988 + 61506014989.

It is an arithmetic number, because the mean of its divisors is an integer number (61506014989).

Almost surely, 2^123012029977 is an apocalyptic number.

It is an amenable number.

123012029977 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012029977 is an equidigital number, since it uses as much as digits as its factorization.

123012029977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The spelling of 123012029977 in words is "one hundred twenty-three billion, twelve million, twenty-nine thousand, nine hundred seventy-seven".