123031101877 has 2 divisors, whose sum is σ = 123031101878. Its totient is φ = 123031101876.

The previous prime is 123031101847. The next prime is 123031101911. The reversal of 123031101877 is 778101130321.

It is a happy number.

It is an a-pointer prime, because the next prime (123031101911) can be obtained adding 123031101877 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110467157956 + 12563943921 = 332366^2 + 112089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123031101877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123031101827) 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, 61515550938 + 61515550939.

It is an arithmetic number, because the mean of its divisors is an integer number (61515550939).

Almost surely, 2^123031101877 is an apocalyptic number.

It is an amenable number.

123031101877 is a deficient number, since it is larger than the sum of its proper divisors (1).

123031101877 is an equidigital number, since it uses as much as digits as its factorization.

123031101877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 123031101877 in words is "one hundred twenty-three billion, thirty-one million, one hundred one thousand, eight hundred seventy-seven".