1312210021013 has 4 divisors (see below), whose sum is σ = 1312229531820. Its totient is φ = 1312190510208.

The previous prime is 1312210020997. The next prime is 1312210021033. The reversal of 1312210021013 is 3101200122131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 325650552964 + 986559468049 = 570658^2 + 993257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312210021013 - 2⁴ = 1312210020997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312210020982 and 1312210021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312210021033) 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, 9654170 + ... + 9789147.

It is an arithmetic number, because the mean of its divisors is an integer number (328057382955).

Almost surely, 2^{1312210021013} is an apocalyptic number.

It is an amenable number.

1312210021013 is a deficient number, since it is larger than the sum of its proper divisors (19510807).

1312210021013 is an equidigital number, since it uses as much as digits as its factorization.

1312210021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19510806.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1312210021013 its reverse (3101200122131), we get a palindrome (4413410143144).

The spelling of 1312210021013 in words is "one trillion, three hundred twelve billion, two hundred ten million, twenty-one thousand, thirteen".