12100110021 has 8 divisors (see below), whose sum is σ = 17926088960. Its totient is φ = 8066739996.

The previous prime is 12100110007. The next prime is 12100110031. The reversal of 12100110021 is 12001100121.

It is a happy number.

It is not a de Polignac number, because 12100110021 - 2¹³ = 12100101829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100109985 and 12100110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100110031) 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, 224076085 + ... + 224076138.

It is an arithmetic number, because the mean of its divisors is an integer number (2240761120).

Almost surely, 2^12100110021 is an apocalyptic number.

It is an amenable number.

12100110021 is a deficient number, since it is larger than the sum of its proper divisors (5825978939).

12100110021 is an equidigital number, since it uses as much as digits as its factorization.

12100110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448152232 (or 448152226 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12100110021 its reverse (12001100121), we get a palindrome (24101210142).

The spelling of 12100110021 in words is "twelve billion, one hundred million, one hundred ten thousand, twenty-one".