1331031122213 has 4 divisors (see below), whose sum is σ = 1433418131628. Its totient is φ = 1228644112800.

The previous prime is 1331031122189. The next prime is 1331031122231. The reversal of 1331031122213 is 3122211301331.

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 393739935169 + 937291187044 = 627487^2 + 968138^2 .

It is not a de Polignac number, because 1331031122213 - 2⁸ = 1331031121957 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 (1331031122243) 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, 51193504688 + ... + 51193504713.

It is an arithmetic number, because the mean of its divisors is an integer number (358354532907).

Almost surely, 2^{1331031122213} is an apocalyptic number.

1331031122213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1331031122213 is a deficient number, since it is larger than the sum of its proper divisors (102387009415).

1331031122213 is a wasteful number, since it uses less digits than its factorization.

1331031122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102387009414.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1331031122213 its reverse (3122211301331), we get a palindrome (4453242423544).

The spelling of 1331031122213 in words is "one trillion, three hundred thirty-one billion, thirty-one million, one hundred twenty-two thousand, two hundred thirteen".