123103135220987 has 2 divisors, whose sum is σ = 123103135220988. Its totient is φ = 123103135220986.

The previous prime is 123103135220981. The next prime is 123103135221067. The reversal of 123103135220987 is 789022531301321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123103135220987 - 2¹⁰ = 123103135219963 is a prime.

It is a super-2 number, since 2×123103135220987² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123103135220981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61551567610493 + 61551567610494.

It is an arithmetic number, because the mean of its divisors is an integer number (61551567610494).

Almost surely, 2^{123103135220987} is an apocalyptic number.

123103135220987 is a deficient number, since it is larger than the sum of its proper divisors (1).

123103135220987 is an equidigital number, since it uses as much as digits as its factorization.

123103135220987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 123103135220987 in words is "one hundred twenty-three trillion, one hundred three billion, one hundred thirty-five million, two hundred twenty thousand, nine hundred eighty-seven".