31103313013133 has 12 divisors (see below), whose sum is σ = 32343718496220. Its totient is φ = 29908260570240.

The previous prime is 31103313013121. The next prime is 31103313013151. The reversal of 31103313013133 is 33131031330113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16341749655049 + 14761563358084 = 4042493^2 + 3842078^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31103313013133 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 (31103313013103) 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, 102924188 + ... + 103225941.

It is an arithmetic number, because the mean of its divisors is an integer number (2695309874685).

Almost surely, 2^{31103313013133} is an apocalyptic number.

It is an amenable number.

31103313013133 is a deficient number, since it is larger than the sum of its proper divisors (1240405483087).

31103313013133 is a wasteful number, since it uses less digits than its factorization.

31103313013133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206150348 (or 206150317 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 26.

Adding to 31103313013133 its reverse (33131031330113), we get a palindrome (64234344343246).

The spelling of 31103313013133 in words is "thirty-one trillion, one hundred three billion, three hundred thirteen million, thirteen thousand, one hundred thirty-three".