1313121031231 has 2 divisors, whose sum is σ = 1313121031232. Its totient is φ = 1313121031230.

The previous prime is 1313121031213. The next prime is 1313121031241. The reversal of 1313121031231 is 1321301213131.

Together with previous prime (1313121031213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1321301213131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313121031231 - 2¹¹ = 1313121029183 is a prime.

It is a super-2 number, since 2×1313121031231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313121031241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656560515615 + 656560515616.

It is an arithmetic number, because the mean of its divisors is an integer number (656560515616).

Almost surely, 2^{1313121031231} is an apocalyptic number.

1313121031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313121031231 is an equidigital number, since it uses as much as digits as its factorization.

1313121031231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1313121031231 its reverse (1321301213131), we get a palindrome (2634422244362).

The spelling of 1313121031231 in words is "one trillion, three hundred thirteen billion, one hundred twenty-one million, thirty-one thousand, two hundred thirty-one".