31032140021 has 8 divisors (see below), whose sum is σ = 31431861120. Its totient is φ = 30632591808.

The previous prime is 31032140003. The next prime is 31032140033. The reversal of 31032140021 is 12004123013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31032140021 - 2¹⁴ = 31032123637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032146021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339770 + ... + 421316.

It is an arithmetic number, because the mean of its divisors is an integer number (3928982640).

Almost surely, 2^31032140021 is an apocalyptic number.

It is an amenable number.

31032140021 is a deficient number, since it is larger than the sum of its proper divisors (399721099).

31032140021 is an equidigital number, since it uses as much as digits as its factorization.

31032140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86443.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31032140021 its reverse (12004123013), we get a palindrome (43036263034).

The spelling of 31032140021 in words is "thirty-one billion, thirty-two million, one hundred forty thousand, twenty-one".