43212420401 has 4 divisors (see below), whose sum is σ = 45091221312. Its totient is φ = 41333619492.

The previous prime is 43212420397. The next prime is 43212420413. The reversal of 43212420401 is 10402421234.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43212420401 - 2² = 43212420397 is a prime.

It is a super-2 number, since 2×43212420401² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1878800887 = 43212420401 / (4 + 3 + 2 + 1 + 2 + 4 + 2 + 0 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43212420481) 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 in 3 ways as a sum of consecutive naturals, for example, 939400421 + ... + 939400466.

It is an arithmetic number, because the mean of its divisors is an integer number (11272805328).

Almost surely, 2^43212420401 is an apocalyptic number.

It is an amenable number.

43212420401 is a deficient number, since it is larger than the sum of its proper divisors (1878800911).

43212420401 is a wasteful number, since it uses less digits than its factorization.

43212420401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878800910.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 43212420401 its reverse (10402421234), we get a palindrome (53614841635).

The spelling of 43212420401 in words is "forty-three billion, two hundred twelve million, four hundred twenty thousand, four hundred one".