100120215220 has 48 divisors (see below), whose sum is σ = 211303612800. Its totient is φ = 39848088960.

The previous prime is 100120215203. The next prime is 100120215241. The reversal of 100120215220 is 22512021001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100120215194 and 100120215203.

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, 8380011 + ... + 8391949.

It is an arithmetic number, because the mean of its divisors is an integer number (4402158600).

Almost surely, 2^100120215220 is an apocalyptic number.

100120215220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100120215220 is an abundant number, since it is smaller than the sum of its proper divisors (111183397580).

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

100120215220 is a wasteful number, since it uses less digits than its factorization.

100120215220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14008 (or 14006 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 100120215220 its reverse (22512021001), we get a palindrome (122632236221).

The spelling of 100120215220 in words is "one hundred billion, one hundred twenty million, two hundred fifteen thousand, two hundred twenty".