123386921236 has 6 divisors (see below), whose sum is σ = 215927112170. Its totient is φ = 61693460616.

The previous prime is 123386921219. The next prime is 123386921239. The reversal of 123386921236 is 632129683321.

It can be written as a sum of positive squares in only one way, i.e., 113135358736 + 10251562500 = 336356^2 + 101250^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123386921239) 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, 15423365151 + ... + 15423365158.

Almost surely, 2^123386921236 is an apocalyptic number.

It is an amenable number.

123386921236 is a deficient number, since it is larger than the sum of its proper divisors (92540190934).

123386921236 is a wasteful number, since it uses less digits than its factorization.

123386921236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30846730313 (or 30846730311 counting only the distinct ones).

The product of its digits is 559872, while the sum is 46.

The spelling of 123386921236 in words is "one hundred twenty-three billion, three hundred eighty-six million, nine hundred twenty-one thousand, two hundred thirty-six".