1313121100031 has 4 divisors (see below), whose sum is σ = 1414130415432. Its totient is φ = 1212111784632.

The previous prime is 1313121100013. The next prime is 1313121100099. The reversal of 1313121100031 is 1300011213131.

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 1313121100031 - 2¹⁴ = 1313121083647 is a prime.

It is a super-2 number, since 2×1313121100031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313121099982 and 1313121100009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313121100531) 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, 50504657681 + ... + 50504657706.

It is an arithmetic number, because the mean of its divisors is an integer number (353532603858).

Almost surely, 2^{1313121100031} is an apocalyptic number.

1313121100031 is a deficient number, since it is larger than the sum of its proper divisors (101009315401).

1313121100031 is a wasteful number, since it uses less digits than its factorization.

1313121100031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101009315400.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 1313121100031 its reverse (1300011213131), we get a palindrome (2613132313162).

The spelling of 1313121100031 in words is "one trillion, three hundred thirteen billion, one hundred twenty-one million, one hundred thousand, thirty-one".