123011858077 has 2 divisors, whose sum is σ = 123011858078. Its totient is φ = 123011858076.

The previous prime is 123011858063. The next prime is 123011858087. The reversal of 123011858077 is 770858110321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97836958521 + 25174899556 = 312789^2 + 158666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123011858077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123011858087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61505929038 + 61505929039.

It is an arithmetic number, because the mean of its divisors is an integer number (61505929039).

Almost surely, 2^123011858077 is an apocalyptic number.

It is an amenable number.

123011858077 is a deficient number, since it is larger than the sum of its proper divisors (1).

123011858077 is an equidigital number, since it uses as much as digits as its factorization.

123011858077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 43.

Adding to 123011858077 its reverse (770858110321), we get a palindrome (893869968398).

The spelling of 123011858077 in words is "one hundred twenty-three billion, eleven million, eight hundred fifty-eight thousand, seventy-seven".