31103330231212 has 24 divisors (see below), whose sum is σ = 54794809988352. Its totient is φ = 15447683442000.

The previous prime is 31103330231189. The next prime is 31103330231251. The reversal of 31103330231212 is 21213203330113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7822263 + ... + 11108305.

It is an arithmetic number, because the mean of its divisors is an integer number (2283117082848).

Almost surely, 2^{31103330231212} is an apocalyptic number.

It is an amenable number.

31103330231212 is a deficient number, since it is larger than the sum of its proper divisors (23691479757140).

31103330231212 is a wasteful number, since it uses less digits than its factorization.

31103330231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301869 (or 3301867 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31103330231212 its reverse (21213203330113), we get a palindrome (52316533561325).

The spelling of 31103330231212 in words is "thirty-one trillion, one hundred three billion, three hundred thirty million, two hundred thirty-one thousand, two hundred twelve".