431401120421 has 4 divisors (see below), whose sum is σ = 440579867712. Its totient is φ = 422222373132.

The previous prime is 431401120361. The next prime is 431401120439. The reversal of 431401120421 is 124021104134.

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 431401120421 - 2⁶ = 431401120357 is a prime.

It is a super-2 number, since 2×431401120421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431401120441) 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, 4589373575 + ... + 4589373668.

It is an arithmetic number, because the mean of its divisors is an integer number (110144966928).

Almost surely, 2^431401120421 is an apocalyptic number.

It is an amenable number.

431401120421 is a deficient number, since it is larger than the sum of its proper divisors (9178747291).

431401120421 is an equidigital number, since it uses as much as digits as its factorization.

431401120421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9178747290.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 431401120421 its reverse (124021104134), we get a palindrome (555422224555).

The spelling of 431401120421 in words is "four hundred thirty-one billion, four hundred one million, one hundred twenty thousand, four hundred twenty-one".