31103032121 has 8 divisors (see below), whose sum is σ = 36772057920. Its totient is φ = 25740440208.

The previous prime is 31103032097. The next prime is 31103032157. The reversal of 31103032121 is 12123030113.

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

It is not a de Polignac number, because 31103032121 - 2¹⁰ = 31103031097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31103032121.

It is not an unprimeable number, because it can be changed into a prime (31103032021) 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, 76608251 + ... + 76608656.

It is an arithmetic number, because the mean of its divisors is an integer number (4596507240).

Almost surely, 2^31103032121 is an apocalyptic number.

It is an amenable number.

31103032121 is a deficient number, since it is larger than the sum of its proper divisors (5669025799).

31103032121 is a wasteful number, since it uses less digits than its factorization.

31103032121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153216943.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31103032121 its reverse (12123030113), we get a palindrome (43226062234).

The spelling of 31103032121 in words is "thirty-one billion, one hundred three million, thirty-two thousand, one hundred twenty-one".