100110001220 has 24 divisors (see below), whose sum is σ = 210238776384. Its totient is φ = 40042519776.

The previous prime is 100110001193. The next prime is 100110001223. The reversal of 100110001220 is 22100011001.

It is a junction number, because it is equal to n+sod(n) for n = 100110001198 and 100110001207.

It is not an unprimeable number, because it can be changed into a prime (100110001223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581639 + ... + 733841.

It is an arithmetic number, because the mean of its divisors is an integer number (8759949016).

Almost surely, 2^100110001220 is an apocalyptic number.

100110001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100110001220 is an abundant number, since it is smaller than the sum of its proper divisors (110128775164).

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

100110001220 is a wasteful number, since it uses less digits than its factorization.

100110001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185099 (or 185097 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 100110001220 its reverse (22100011001), we get a palindrome (122210012221).

The spelling of 100110001220 in words is "one hundred billion, one hundred ten million, one thousand, two hundred twenty".