31230003021 has 16 divisors (see below), whose sum is σ = 47592866304. Its totient is φ = 17844107184.

The previous prime is 31230002971. The next prime is 31230003029. The reversal of 31230003021 is 12030003213.

It is not a de Polignac number, because 31230003021 - 2⁷ = 31230002893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230003029) 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, 195330 + ... + 317196.

It is an arithmetic number, because the mean of its divisors is an integer number (2974554144).

Almost surely, 2^31230003021 is an apocalyptic number.

It is an amenable number.

31230003021 is a deficient number, since it is larger than the sum of its proper divisors (16362863283).

31230003021 is a wasteful number, since it uses less digits than its factorization.

31230003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134080.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31230003021 its reverse (12030003213), we get a palindrome (43260006234).

The spelling of 31230003021 in words is "thirty-one billion, two hundred thirty million, three thousand, twenty-one".