43422004312121 has 4 divisors (see below), whose sum is σ = 43451166170100. Its totient is φ = 43392842454144.

The previous prime is 43422004312117. The next prime is 43422004312129. The reversal of 43422004312121 is 12121340022434.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21307557552121 + 22114446760000 = 4616011^2 + 4702600^2 .

It is a cyclic number.

It is not a de Polignac number, because 43422004312121 - 2² = 43422004312117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43422004312129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14580926756 + ... + 14580929733.

It is an arithmetic number, because the mean of its divisors is an integer number (10862791542525).

Almost surely, 2^{43422004312121} is an apocalyptic number.

It is an amenable number.

43422004312121 is a deficient number, since it is larger than the sum of its proper divisors (29161857979).

43422004312121 is a wasteful number, since it uses less digits than its factorization.

43422004312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29161857978.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 43422004312121 its reverse (12121340022434), we get a palindrome (55543344334555).

The spelling of 43422004312121 in words is "forty-three trillion, four hundred twenty-two billion, four million, three hundred twelve thousand, one hundred twenty-one".