1321212001313 has 8 divisors (see below), whose sum is σ = 1322459502888. Its totient is φ = 1319964678144.

The previous prime is 1321212001297. The next prime is 1321212001321. The reversal of 1321212001313 is 3131002121231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 549470835169 + 771741166144 = 741263^2 + 878488^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321212001313 - 2⁴ = 1321212001297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321212001393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18270095 + ... + 18342267.

It is an arithmetic number, because the mean of its divisors is an integer number (165307437861).

Almost surely, 2^{1321212001313} is an apocalyptic number.

It is an amenable number.

1321212001313 is a deficient number, since it is larger than the sum of its proper divisors (1247501575).

1321212001313 is a wasteful number, since it uses less digits than its factorization.

1321212001313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89203.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321212001313 its reverse (3131002121231), we get a palindrome (4452214122544).

The spelling of 1321212001313 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, one thousand, three hundred thirteen".