31232003121 has 12 divisors (see below), whose sum is σ = 49214065680. Its totient is φ = 18928486680.

The previous prime is 31232003119. The next prime is 31232003129. The reversal of 31232003121 is 12130023213.

31232003121 is a `hidden beast` number, since 31 + 2 + 320 + 0 + 312 + 1 = 666.

It is not a de Polignac number, because 31232003121 - 2¹ = 31232003119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31232003094 and 31232003103.

It is not an unprimeable number, because it can be changed into a prime (31232003129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157737291 + ... + 157737488.

It is an arithmetic number, because the mean of its divisors is an integer number (4101172140).

Almost surely, 2^31232003121 is an apocalyptic number.

It is an amenable number.

31232003121 is a deficient number, since it is larger than the sum of its proper divisors (17982062559).

31232003121 is a wasteful number, since it uses less digits than its factorization.

31232003121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315474796 (or 315474793 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31232003121 its reverse (12130023213), we get a palindrome (43362026334).

The spelling of 31232003121 in words is "thirty-one billion, two hundred thirty-two million, three thousand, one hundred twenty-one".