12226290421 has 2 divisors, whose sum is σ = 12226290422. Its totient is φ = 12226290420.

The previous prime is 12226290341. The next prime is 12226290443. The reversal of 12226290421 is 12409262221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7971989796 + 4254300625 = 89286^2 + 65225^2 .

It is a cyclic number.

It is not a de Polignac number, because 12226290421 - 2⁹ = 12226289909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12226290121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113145210 + 6113145211.

It is an arithmetic number, because the mean of its divisors is an integer number (6113145211).

Almost surely, 2^12226290421 is an apocalyptic number.

It is an amenable number.

12226290421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12226290421 is an equidigital number, since it uses as much as digits as its factorization.

12226290421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 12226290421 in words is "twelve billion, two hundred twenty-six million, two hundred ninety thousand, four hundred twenty-one".