403243012121 has 2 divisors, whose sum is σ = 403243012122. Its totient is φ = 403243012120.

The previous prime is 403243012093. The next prime is 403243012177. The reversal of 403243012121 is 121210342304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299494602121 + 103748410000 = 547261^2 + 322100^2 .

It is a cyclic number.

It is not a de Polignac number, because 403243012121 - 2¹⁴ = 403242995737 is a prime.

It is not a weakly prime, because it can be changed into another prime (403243012181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201621506060 + 201621506061.

It is an arithmetic number, because the mean of its divisors is an integer number (201621506061).

Almost surely, 2^403243012121 is an apocalyptic number.

It is an amenable number.

403243012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

403243012121 is an equidigital number, since it uses as much as digits as its factorization.

403243012121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 403243012121 its reverse (121210342304), we get a palindrome (524453354425).

The spelling of 403243012121 in words is "four hundred three billion, two hundred forty-three million, twelve thousand, one hundred twenty-one".