431421221121 has 16 divisors (see below), whose sum is σ = 660549239040. Its totient is φ = 247705963920.

The previous prime is 431421221081. The next prime is 431421221137. The reversal of 431421221121 is 121122124134.

It is not a de Polignac number, because 431421221121 - 2⁶ = 431421221057 is a prime.

It is a super-2 number, since 2×431421221121² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 431421221091 and 431421221100.

It is not an unprimeable number, because it can be changed into a prime (431421229121) 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 15 ways as a sum of consecutive naturals, for example, 344035435 + ... + 344036688.

It is an arithmetic number, because the mean of its divisors is an integer number (41284327440).

Almost surely, 2^431421221121 is an apocalyptic number.

It is an amenable number.

431421221121 is a deficient number, since it is larger than the sum of its proper divisors (229128017919).

431421221121 is a wasteful number, since it uses less digits than its factorization.

431421221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688072156.

The product of its digits is 768, while the sum is 24.

Adding to 431421221121 its reverse (121122124134), we get a palindrome (552543345255).

The spelling of 431421221121 in words is "four hundred thirty-one billion, four hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".