123100203220 has 96 divisors (see below), whose sum is σ = 268242024960. Its totient is φ = 47425720320.

The previous prime is 123100203217. The next prime is 123100203241. The reversal of 123100203220 is 22302001321.

It is a junction number, because it is equal to n+sod(n) for n = 123100203194 and 123100203203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16499851 + ... + 16507309.

It is an arithmetic number, because the mean of its divisors is an integer number (2794187760).

Almost surely, 2^123100203220 is an apocalyptic number.

123100203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123100203220 is an abundant number, since it is smaller than the sum of its proper divisors (145141821740).

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

123100203220 is a wasteful number, since it uses less digits than its factorization.

123100203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7793 (or 7791 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 123100203220 its reverse (22302001321), we get a palindrome (145402204541).

The spelling of 123100203220 in words is "one hundred twenty-three billion, one hundred million, two hundred three thousand, two hundred twenty".