31103324120 has 64 divisors (see below), whose sum is σ = 79663875840. Its totient is φ = 10818544000.

The previous prime is 31103324111. The next prime is 31103324167. The reversal of 31103324120 is 2142330113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31103324092 and 31103324101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1526606 + ... + 1546845.

It is an arithmetic number, because the mean of its divisors is an integer number (1244748060).

Almost surely, 2^31103324120 is an apocalyptic number.

It is an amenable number.

31103324120 is an abundant number, since it is smaller than the sum of its proper divisors (48560551720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31103324120 is a wasteful number, since it uses less digits than its factorization.

31103324120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073496 (or 3073492 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31103324120 its reverse (2142330113), we get a palindrome (33245654233).

The spelling of 31103324120 in words is "thirty-one billion, one hundred three million, three hundred twenty-four thousand, one hundred twenty".