12100231021 has 4 divisors (see below), whose sum is σ = 12280831552. Its totient is φ = 11919630492.

The previous prime is 12100231009. The next prime is 12100231051. The reversal of 12100231021 is 12013200121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12100231021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100230992 and 12100231010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100231051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90300165 + ... + 90300298.

It is an arithmetic number, because the mean of its divisors is an integer number (3070207888).

Almost surely, 2^12100231021 is an apocalyptic number.

It is an amenable number.

12100231021 is a deficient number, since it is larger than the sum of its proper divisors (180600531).

12100231021 is an equidigital number, since it uses as much as digits as its factorization.

12100231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180600530.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12100231021 its reverse (12013200121), we get a palindrome (24113431142).

The spelling of 12100231021 in words is "twelve billion, one hundred million, two hundred thirty-one thousand, twenty-one".