1313012021031 has 10 divisors (see below), whose sum is σ = 1961413019192. Its totient is φ = 875341347300.

The previous prime is 1313012020963. The next prime is 1313012021039. The reversal of 1313012021031 is 1301202103131.

1313012021031 is a `hidden beast` number, since 131 + 301 + 20 + 210 + 3 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1313012021031 is a prime.

It is a super-2 number, since 2×1313012021031² (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 = 1313012020995 and 1313012021013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313012021039) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8105012395 + ... + 8105012556.

Almost surely, 2^{1313012021031} is an apocalyptic number.

1313012021031 is a deficient number, since it is larger than the sum of its proper divisors (648400998161).

1313012021031 is an equidigital number, since it uses as much as digits as its factorization.

1313012021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16210024963 (or 16210024954 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1313012021031 its reverse (1301202103131), we get a palindrome (2614214124162).

The spelling of 1313012021031 in words is "one trillion, three hundred thirteen billion, twelve million, twenty-one thousand, thirty-one".