123220544100 has 72 divisors (see below), whose sum is σ = 377489776608. Its totient is φ = 30925939200.

The previous prime is 123220544099. The next prime is 123220544123. The reversal of 123220544100 is 1445022321.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12075346 + ... + 12085545.

It is an arithmetic number, because the mean of its divisors is an integer number (5242913564).

Almost surely, 2^123220544100 is an apocalyptic number.

123220544100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123220544100 is an abundant number, since it is smaller than the sum of its proper divisors (254269232508).

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

123220544100 is a wasteful number, since it uses less digits than its factorization.

123220544100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24160925 (or 24160918 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 123220544100 its reverse (1445022321), we get a palindrome (124665566421).

The spelling of 123220544100 in words is "one hundred twenty-three billion, two hundred twenty million, five hundred forty-four thousand, one hundred".