31031220113333 has 12 divisors (see below), whose sum is σ = 34109291294400. Its totient is φ = 28209708158280.

The previous prime is 31031220113297. The next prime is 31031220113359. The reversal of 31031220113333 is 33331102213013.

It is not a de Polignac number, because 31031220113333 - 2⁶ = 31031220113269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031220613333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4822916 + ... + 9237042.

It is an arithmetic number, because the mean of its divisors is an integer number (2842440941200).

Almost surely, 2^{31031220113333} is an apocalyptic number.

It is an amenable number.

31031220113333 is a deficient number, since it is larger than the sum of its proper divisors (3078071181067).

31031220113333 is a wasteful number, since it uses less digits than its factorization.

31031220113333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472248 (or 4472237 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31031220113333 its reverse (33331102213013), we get a palindrome (64362322326346).

The spelling of 31031220113333 in words is "thirty-one trillion, thirty-one billion, two hundred twenty million, one hundred thirteen thousand, three hundred thirty-three".