105551322123 has 16 divisors (see below), whose sum is σ = 154045480736.
Its totient is φ = 63889827840.
The previous prime is 105551322119. The next prime is 105551322143. The reversal of 105551322123 is 321223155501.
It is not a de Polignac number, because 105551322123 - 22 = 105551322119 is a prime.
It is a super-2 number, since 2×1055513221232 (a number of 23 digits) contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (105551322143) 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 in 15 ways as a sum of consecutive naturals, for example, 22181590 + ... + 22186347.
It is an arithmetic number, because the mean of its divisors is an integer number (9627842546).
Almost surely, 2105551322123 is an apocalyptic number.
105551322123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.
105551322123 is a deficient number, since it is larger than the sum of its proper divisors (48494158613).
105551322123 is a wasteful number, since it uses less digits than its factorization.
105551322123 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 44368014.
The product of its (nonzero) digits is 9000, while the sum is 30.
Adding to 105551322123 its reverse (321223155501), we get a palindrome (426774477624).
The spelling of 105551322123 in words is "one hundred five billion, five hundred fifty-one million, three hundred twenty-two thousand, one hundred twenty-three".