1313012121021 has 12 divisors (see below), whose sum is σ = 1902302896000. Its totient is φ = 872696876040.

The previous prime is 1313012121019. The next prime is 1313012121037. The reversal of 1313012121021 is 1201212103131.

1313012121021 is a `hidden beast` number, since 1 + 313 + 0 + 121 + 210 + 21 = 666.

It is not a de Polignac number, because 1313012121021 - 2¹ = 1313012121019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313012120985 and 1313012121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313012121221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220375021 + ... + 220380978.

Almost surely, 2^{1313012121021} is an apocalyptic number.

It is an amenable number.

1313012121021 is a deficient number, since it is larger than the sum of its proper divisors (589290774979).

1313012121021 is a wasteful number, since it uses less digits than its factorization.

1313012121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440756336 (or 440756333 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1313012121021 its reverse (1201212103131), we get a palindrome (2514224224152).

The spelling of 1313012121021 in words is "one trillion, three hundred thirteen billion, twelve million, one hundred twenty-one thousand, twenty-one".