105123311101663 has 4 divisors (see below), whose sum is σ = 105231574038888. Its totient is φ = 105015048164440.

The previous prime is 105123311101583. The next prime is 105123311101717. The reversal of 105123311101663 is 366101113321501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105123311101663 is a prime.

It is a super-2 number, since 2×105123311101663² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105123311107663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54131467156 + ... + 54131469097.

It is an arithmetic number, because the mean of its divisors is an integer number (26307893509722).

Almost surely, 2^{105123311101663} is an apocalyptic number.

105123311101663 is a deficient number, since it is larger than the sum of its proper divisors (108262937225).

105123311101663 is an equidigital number, since it uses as much as digits as its factorization.

105123311101663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108262937224.

The product of its (nonzero) digits is 9720, while the sum is 34.

The spelling of 105123311101663 in words is "one hundred five trillion, one hundred twenty-three billion, three hundred eleven million, one hundred one thousand, six hundred sixty-three".