12042201421 has 2 divisors, whose sum is σ = 12042201422. Its totient is φ = 12042201420.

The previous prime is 12042201407. The next prime is 12042201433. The reversal of 12042201421 is 12410224021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11191312521 + 850888900 = 105789^2 + 29170^2 .

It is a cyclic number.

It is not a de Polignac number, because 12042201421 - 2⁹ = 12042200909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12042201461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6021100710 + 6021100711.

It is an arithmetic number, because the mean of its divisors is an integer number (6021100711).

Almost surely, 2^12042201421 is an apocalyptic number.

It is an amenable number.

12042201421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12042201421 is an equidigital number, since it uses as much as digits as its factorization.

12042201421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12042201421 its reverse (12410224021), we get a palindrome (24452425442).

The spelling of 12042201421 in words is "twelve billion, forty-two million, two hundred one thousand, four hundred twenty-one".