31130103021 has 8 divisors (see below), whose sum is σ = 41512872384. Its totient is φ = 20750367840.

The previous prime is 31130103019. The next prime is 31130103077. The reversal of 31130103021 is 12030103113.

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

It is not a de Polignac number, because 31130103021 - 2¹ = 31130103019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130103821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734496 + ... + 775721.

It is an arithmetic number, because the mean of its divisors is an integer number (5189109048).

Almost surely, 2^31130103021 is an apocalyptic number.

It is an amenable number.

31130103021 is a deficient number, since it is larger than the sum of its proper divisors (10382769363).

31130103021 is a wasteful number, since it uses less digits than its factorization.

31130103021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517091.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31130103021 its reverse (12030103113), we get a palindrome (43160206134).

The spelling of 31130103021 in words is "thirty-one billion, one hundred thirty million, one hundred three thousand, twenty-one".