31212024231 has 4 divisors (see below), whose sum is σ = 41616032312. Its totient is φ = 20808016152.

The previous prime is 31212024211. The next prime is 31212024241. The reversal of 31212024231 is 13242021213.

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

It is not a de Polignac number, because 31212024231 - 2¹⁰ = 31212023207 is a prime.

It is a super-2 number, since 2×31212024231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212024198 and 31212024207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212024211) 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, 5202004036 + ... + 5202004041.

It is an arithmetic number, because the mean of its divisors is an integer number (10404008078).

Almost surely, 2^31212024231 is an apocalyptic number.

31212024231 is a deficient number, since it is larger than the sum of its proper divisors (10404008081).

31212024231 is a wasteful number, since it uses less digits than its factorization.

31212024231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10404008080.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31212024231 its reverse (13242021213), we get a palindrome (44454045444).

The spelling of 31212024231 in words is "thirty-one billion, two hundred twelve million, twenty-four thousand, two hundred thirty-one".