123110113220 has 24 divisors (see below), whose sum is σ = 260903088600. Its totient is φ = 48792264192.

The previous prime is 123110113201. The next prime is 123110113223. The reversal of 123110113220 is 22311011321.

It can be written as a sum of positive squares in 4 ways, for example, as 19414520896 + 103695592324 = 139336^2 + 322018^2 .

It is not an unprimeable number, because it can be changed into a prime (123110113223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28234085 + ... + 28238444.

It is an arithmetic number, because the mean of its divisors is an integer number (10870962025).

Almost surely, 2^123110113220 is an apocalyptic number.

123110113220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123110113220 is an abundant number, since it is smaller than the sum of its proper divisors (137792975380).

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

123110113220 is a wasteful number, since it uses less digits than its factorization.

123110113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56472647 (or 56472645 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 123110113220 its reverse (22311011321), we get a palindrome (145421124541).

The spelling of 123110113220 in words is "one hundred twenty-three billion, one hundred ten million, one hundred thirteen thousand, two hundred twenty".