100987543123 has 2 divisors, whose sum is σ = 100987543124. Its totient is φ = 100987543122.

The previous prime is 100987543099. The next prime is 100987543127. The reversal of 100987543123 is 321345789001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100987543123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100987543123.

It is not a weakly prime, because it can be changed into another prime (100987543127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50493771561 + 50493771562.

It is an arithmetic number, because the mean of its divisors is an integer number (50493771562).

Almost surely, 2^100987543123 is an apocalyptic number.

100987543123 is a deficient number, since it is larger than the sum of its proper divisors (1).

100987543123 is an equidigital number, since it uses as much as digits as its factorization.

100987543123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 100987543123 in words is "one hundred billion, nine hundred eighty-seven million, five hundred forty-three thousand, one hundred twenty-three".