1313131100231 has 4 divisors (see below), whose sum is σ = 1326668534352. Its totient is φ = 1299593666112.

The previous prime is 1313131100227. The next prime is 1313131100233. The reversal of 1313131100231 is 1320011313131.

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

It is a cyclic number.

It is not a de Polignac number, because 1313131100231 - 2² = 1313131100227 is a prime.

It is a super-2 number, since 2×1313131100231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313131100233) 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, 6768716915 + ... + 6768717108.

It is an arithmetic number, because the mean of its divisors is an integer number (331667133588).

Almost surely, 2^{1313131100231} is an apocalyptic number.

1313131100231 is a deficient number, since it is larger than the sum of its proper divisors (13537434121).

1313131100231 is an equidigital number, since it uses as much as digits as its factorization.

1313131100231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13537434120.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 1313131100231 its reverse (1320011313131), we get a palindrome (2633142413362).

The spelling of 1313131100231 in words is "one trillion, three hundred thirteen billion, one hundred thirty-one million, one hundred thousand, two hundred thirty-one".