123876121 has 2 divisors, whose sum is σ = 123876122. Its totient is φ = 123876120.

The previous prime is 123876101. The next prime is 123876133. The reversal of 123876121 is 121678321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84437721 + 39438400 = 9189^2 + 6280^2 .

It is a cyclic number.

It is not a de Polignac number, because 123876121 - 2¹⁵ = 123843353 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (123876101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61938060 + 61938061.

It is an arithmetic number, because the mean of its divisors is an integer number (61938061).

Almost surely, 2^123876121 is an apocalyptic number.

It is an amenable number.

123876121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123876121 is an equidigital number, since it uses as much as digits as its factorization.

123876121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 123876121 is about 11129.9650044373. The cubic root of 123876121 is about 498.4969810620.

The spelling of 123876121 in words is "one hundred twenty-three million, eight hundred seventy-six thousand, one hundred twenty-one".