100121110221 has 16 divisors (see below), whose sum is σ = 147072598848. Its totient is φ = 60078672000.

The previous prime is 100121110213. The next prime is 100121110237. The reversal of 100121110221 is 122011121001.

It is not a de Polignac number, because 100121110221 - 2³ = 100121110213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100121110197 and 100121110206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121110321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15016336 + ... + 15023001.

It is an arithmetic number, because the mean of its divisors is an integer number (9192037428).

Almost surely, 2^100121110221 is an apocalyptic number.

100121110221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100121110221 is a deficient number, since it is larger than the sum of its proper divisors (46951488627).

100121110221 is a wasteful number, since it uses less digits than its factorization.

100121110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30039452.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100121110221 its reverse (122011121001), we get a palindrome (222132231222).

The spelling of 100121110221 in words is "one hundred billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".