100556365123 has 2 divisors, whose sum is σ = 100556365124. Its totient is φ = 100556365122.

The previous prime is 100556365097. The next prime is 100556365199. The reversal of 100556365123 is 321563655001.

It is a weak prime.

It is an emirp because it is prime and its reverse (321563655001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100556365123 - 2⁹ = 100556364611 is a prime.

It is a super-2 number, since 2×100556365123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100556365523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50278182561 + 50278182562.

It is an arithmetic number, because the mean of its divisors is an integer number (50278182562).

Almost surely, 2^100556365123 is an apocalyptic number.

100556365123 is a deficient number, since it is larger than the sum of its proper divisors (1).

100556365123 is an equidigital number, since it uses as much as digits as its factorization.

100556365123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 100556365123 in words is "one hundred billion, five hundred fifty-six million, three hundred sixty-five thousand, one hundred twenty-three".