100201121220 has 48 divisors (see below), whose sum is σ = 281561632128. Its totient is φ = 26625204480.

The previous prime is 100201121213. The next prime is 100201121231. The reversal of 100201121220 is 22121102001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100201121196 and 100201121205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2954704 + ... + 2988423.

It is an arithmetic number, because the mean of its divisors is an integer number (5865867336).

Almost surely, 2^100201121220 is an apocalyptic number.

100201121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100201121220 is an abundant number, since it is smaller than the sum of its proper divisors (181360510908).

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

100201121220 is a wasteful number, since it uses less digits than its factorization.

100201121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5943420 (or 5943418 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100201121220 its reverse (22121102001), we get a palindrome (122322223221).

The spelling of 100201121220 in words is "one hundred billion, two hundred one million, one hundred twenty-one thousand, two hundred twenty".