100123123220 has 48 divisors (see below), whose sum is σ = 212129608320. Its totient is φ = 39694249344.

The previous prime is 100123123213. The next prime is 100123123231. The reversal of 100123123220 is 22321321001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1115786 + ... + 1202174.

It is an arithmetic number, because the mean of its divisors is an integer number (4419366840).

Almost surely, 2^100123123220 is an apocalyptic number.

100123123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100123123220 is an abundant number, since it is smaller than the sum of its proper divisors (112006485100).

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

100123123220 is a wasteful number, since it uses less digits than its factorization.

100123123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86912 (or 86910 counting only the distinct ones).

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

Adding to 100123123220 its reverse (22321321001), we get a palindrome (122444444221).

The spelling of 100123123220 in words is "one hundred billion, one hundred twenty-three million, one hundred twenty-three thousand, two hundred twenty".