43221423123 has 8 divisors (see below), whose sum is σ = 64031738000. Its totient is φ = 28814282064.

The previous prime is 43221423121. The next prime is 43221423137. The reversal of 43221423123 is 32132412234.

43221423123 is a `hidden beast` number, since 4 + 3 + 221 + 423 + 12 + 3 = 666.

It is not a de Polignac number, because 43221423123 - 2¹ = 43221423121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1600793449 = 43221423123 / (4 + 3 + 2 + 2 + 1 + 4 + 2 + 3 + 1 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43221423121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 800396698 + ... + 800396751.

It is an arithmetic number, because the mean of its divisors is an integer number (8003967250).

Almost surely, 2^43221423123 is an apocalyptic number.

43221423123 is a deficient number, since it is larger than the sum of its proper divisors (20810314877).

43221423123 is a wasteful number, since it uses less digits than its factorization.

43221423123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600793458 (or 1600793452 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 43221423123 its reverse (32132412234), we get a palindrome (75353835357).

The spelling of 43221423123 in words is "forty-three billion, two hundred twenty-one million, four hundred twenty-three thousand, one hundred twenty-three".