123100123220 has 48 divisors (see below), whose sum is σ = 259350326928. Its totient is φ = 49080192000.

The previous prime is 123100123219. The next prime is 123100123241. The reversal of 123100123220 is 22321001321.

It can be written as a sum of positive squares in 8 ways, for example, as 8164206736 + 114935916484 = 90356^2 + 339022^2 .

It is a congruent number.

It is an unprimeable number.

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, 17579720 + ... + 17586720.

It is an arithmetic number, because the mean of its divisors is an integer number (5403131811).

Almost surely, 2^123100123220 is an apocalyptic number.

123100123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123100123220 is an abundant number, since it is smaller than the sum of its proper divisors (136250203708).

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

123100123220 is a wasteful number, since it uses less digits than its factorization.

123100123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9740 (or 9738 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 123100123220 its reverse (22321001321), we get a palindrome (145421124541).

The spelling of 123100123220 in words is "one hundred twenty-three billion, one hundred million, one hundred twenty-three thousand, two hundred twenty".