1031311213133 has 4 divisors (see below), whose sum is σ = 1032421344540. Its totient is φ = 1030201081728.

The previous prime is 1031311213123. The next prime is 1031311213223. The reversal of 1031311213133 is 3313121131301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 491375764324 + 539935448809 = 700982^2 + 734803^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031311213133 - 2¹² = 1031311209037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031311213099 and 1031311213108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031311213123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555064310 + ... + 555066167.

It is an arithmetic number, because the mean of its divisors is an integer number (258105336135).

Almost surely, 2^{1031311213133} is an apocalyptic number.

It is an amenable number.

1031311213133 is a deficient number, since it is larger than the sum of its proper divisors (1110131407).

1031311213133 is an equidigital number, since it uses as much as digits as its factorization.

1031311213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110131406.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 1031311213133 its reverse (3313121131301), we get a palindrome (4344432344434).

The spelling of 1031311213133 in words is "one trillion, thirty-one billion, three hundred eleven million, two hundred thirteen thousand, one hundred thirty-three".