43421321126 has 4 divisors (see below), whose sum is σ = 65131981692. Its totient is φ = 21710660562.

The previous prime is 43421321123. The next prime is 43421321143. The reversal of 43421321126 is 62112312434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62112312434 = 2 ⋅31056156217.

It is a super-2 number, since 2×43421321126² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43421321123) 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, 10855330280 + ... + 10855330283.

It is an arithmetic number, because the mean of its divisors is an integer number (16282995423).

Almost surely, 2^43421321126 is an apocalyptic number.

43421321126 is a deficient number, since it is larger than the sum of its proper divisors (21710660566).

43421321126 is a wasteful number, since it uses less digits than its factorization.

43421321126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21710660565.

The product of its digits is 6912, while the sum is 29.

The spelling of 43421321126 in words is "forty-three billion, four hundred twenty-one million, three hundred twenty-one thousand, one hundred twenty-six".