12102203021 has 2 divisors, whose sum is σ = 12102203022. Its totient is φ = 12102203020.

The previous prime is 12102202993. The next prime is 12102203027. The reversal of 12102203021 is 12030220121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9041347396 + 3060855625 = 95086^2 + 55325^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102203021 - 2¹⁴ = 12102186637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12102202987 and 12102203005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102203027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051101510 + 6051101511.

It is an arithmetic number, because the mean of its divisors is an integer number (6051101511).

Almost surely, 2^12102203021 is an apocalyptic number.

It is an amenable number.

12102203021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102203021 is an equidigital number, since it uses as much as digits as its factorization.

12102203021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12102203021 its reverse (12030220121), we get a palindrome (24132423142).

The spelling of 12102203021 in words is "twelve billion, one hundred two million, two hundred three thousand, twenty-one".