12100221021 has 16 divisors (see below), whose sum is σ = 18786328704. Its totient is φ = 6783950784.

The previous prime is 12100220999. The next prime is 12100221043. The reversal of 12100221021 is 12012200121.

It is an interprime number because it is at equal distance from previous prime (12100220999) and next prime (12100221043).

It is not a de Polignac number, because 12100221021 - 2⁷ = 12100220893 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12100220988 and 12100221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100221061) 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, 5434746 + ... + 5436971.

It is an arithmetic number, because the mean of its divisors is an integer number (1174145544).

Almost surely, 2^12100221021 is an apocalyptic number.

It is an amenable number.

12100221021 is a deficient number, since it is larger than the sum of its proper divisors (6686107683).

12100221021 is a wasteful number, since it uses less digits than its factorization.

12100221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10871780.

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

Adding to 12100221021 its reverse (12012200121), we get a palindrome (24112421142).

The spelling of 12100221021 in words is "twelve billion, one hundred million, two hundred twenty-one thousand, twenty-one".