43421321123 has 2 divisors, whose sum is σ = 43421321124. Its totient is φ = 43421321122.

The previous prime is 43421321117. The next prime is 43421321143. The reversal of 43421321123 is 32112312434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43421321123 - 2⁶ = 43421321059 is a prime.

It is a super-2 number, since 2×43421321123² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43421321092 and 43421321101.

It is not a weakly prime, because it can be changed into another prime (43421321143) 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, 21710660561 + 21710660562.

It is an arithmetic number, because the mean of its divisors is an integer number (21710660562).

Almost surely, 2^43421321123 is an apocalyptic number.

43421321123 is a deficient number, since it is larger than the sum of its proper divisors (1).

43421321123 is an equidigital number, since it uses as much as digits as its factorization.

43421321123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

Adding to 43421321123 its reverse (32112312434), we get a palindrome (75533633557).

The spelling of 43421321123 in words is "forty-three billion, four hundred twenty-one million, three hundred twenty-one thousand, one hundred twenty-three".