43003401421 has 2 divisors, whose sum is σ = 43003401422. Its totient is φ = 43003401420.

The previous prime is 43003401403. The next prime is 43003401439. The reversal of 43003401421 is 12410430034.

It is a balanced prime because it is at equal distance from previous prime (43003401403) and next prime (43003401439).

It can be written as a sum of positive squares in only one way, i.e., 37815080521 + 5188320900 = 194461^2 + 72030^2 .

It is a cyclic number.

It is not a de Polignac number, because 43003401421 - 2¹⁹ = 43002877133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43003401392 and 43003401401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43003401401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21501700710 + 21501700711.

It is an arithmetic number, because the mean of its divisors is an integer number (21501700711).

Almost surely, 2^43003401421 is an apocalyptic number.

It is an amenable number.

43003401421 is a deficient number, since it is larger than the sum of its proper divisors (1).

43003401421 is an equidigital number, since it uses as much as digits as its factorization.

43003401421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 43003401421 its reverse (12410430034), we get a palindrome (55413831455).

The spelling of 43003401421 in words is "forty-three billion, three million, four hundred one thousand, four hundred twenty-one".