123108380892 has 144 divisors (see below), whose sum is σ = 375934540800. Its totient is φ = 33182835840.

The previous prime is 123108380881. The next prime is 123108380903. The reversal of 123108380892 is 298083801321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123108380881) and next prime (123108380903).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1090542 + ... + 1198122.

Almost surely, 2^123108380892 is an apocalyptic number.

123108380892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123108380892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187967270400).

123108380892 is an abundant number, since it is smaller than the sum of its proper divisors (252826159908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123108380892 is a wasteful number, since it uses less digits than its factorization.

123108380892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107856 (or 107851 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 123108380892 in words is "one hundred twenty-three billion, one hundred eight million, three hundred eighty thousand, eight hundred ninety-two".