31432423121 has 16 divisors (see below), whose sum is σ = 36119183040. Its totient is φ = 27052585920.

The previous prime is 31432423079. The next prime is 31432423129. The reversal of 31432423121 is 12132423413.

It is a cyclic number.

It is not a de Polignac number, because 31432423121 - 2¹⁴ = 31432406737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31432423129) 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, 261671 + ... + 362403.

It is an arithmetic number, because the mean of its divisors is an integer number (2257448940).

Almost surely, 2^31432423121 is an apocalyptic number.

It is an amenable number.

31432423121 is a deficient number, since it is larger than the sum of its proper divisors (4686759919).

31432423121 is a wasteful number, since it uses less digits than its factorization.

31432423121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102256.

The product of its digits is 3456, while the sum is 26.

Adding to 31432423121 its reverse (12132423413), we get a palindrome (43564846534).

The spelling of 31432423121 in words is "thirty-one billion, four hundred thirty-two million, four hundred twenty-three thousand, one hundred twenty-one".