431120121 has 4 divisors (see below), whose sum is σ = 574826832. Its totient is φ = 287413412.

The previous prime is 431120077. The next prime is 431120149. The reversal of 431120121 is 121021134.

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 431120121 - 2⁶ = 431120057 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 431120121.

It is not an unprimeable number, because it can be changed into a prime (431122121) 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, 71853351 + ... + 71853356.

It is an arithmetic number, because the mean of its divisors is an integer number (143706708).

Almost surely, 2^431120121 is an apocalyptic number.

It is an amenable number.

431120121 is a deficient number, since it is larger than the sum of its proper divisors (143706711).

431120121 is a wasteful number, since it uses less digits than its factorization.

431120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143706710.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 431120121 is about 20763.4323029696. The cubic root of 431120121 is about 755.4390505106.

Adding to 431120121 its reverse (121021134), we get a palindrome (552141255).

The spelling of 431120121 in words is "four hundred thirty-one million, one hundred twenty thousand, one hundred twenty-one".