12100211021 has 2 divisors, whose sum is σ = 12100211022. Its totient is φ = 12100211020.

The previous prime is 12100210987. The next prime is 12100211029. The reversal of 12100211021 is 12011200121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10253790121 + 1846420900 = 101261^2 + 42970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12100211021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12100210993 and 12100211011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12100211029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050105510 + 6050105511.

It is an arithmetic number, because the mean of its divisors is an integer number (6050105511).

Almost surely, 2^12100211021 is an apocalyptic number.

It is an amenable number.

12100211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100211021 is an equidigital number, since it uses as much as digits as its factorization.

12100211021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12100211021 its reverse (12011200121), we get a palindrome (24111411142).

The spelling of 12100211021 in words is "twelve billion, one hundred million, two hundred eleven thousand, twenty-one".