43124402421 has 12 divisors (see below), whose sum is σ = 62305907040. Its totient is φ = 28742630760.

The previous prime is 43124402339. The next prime is 43124402443. The reversal of 43124402421 is 12420442134.

It is not a de Polignac number, because 43124402421 - 2²¹ = 43122305269 is a prime.

It is a super-2 number, since 2×43124402421² (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 (43124402491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 541585 + ... + 616086.

It is an arithmetic number, because the mean of its divisors is an integer number (5192158920).

Almost surely, 2^43124402421 is an apocalyptic number.

It is an amenable number.

43124402421 is a deficient number, since it is larger than the sum of its proper divisors (19181504619).

43124402421 is a wasteful number, since it uses less digits than its factorization.

43124402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161816 (or 1161813 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 43124402421 its reverse (12420442134), we get a palindrome (55544844555).

The spelling of 43124402421 in words is "forty-three billion, one hundred twenty-four million, four hundred two thousand, four hundred twenty-one".