1213232021213 has 2 divisors, whose sum is σ = 1213232021214. Its totient is φ = 1213232021212.

The previous prime is 1213232021189. The next prime is 1213232021257. The reversal of 1213232021213 is 3121202323121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211313756409 + 1918264804 = 1100597^2 + 43798^2 .

It is an emirp because it is prime and its reverse (3121202323121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213232021213 - 2³⁰ = 1212158279389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213232021413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606616010606 + 606616010607.

It is an arithmetic number, because the mean of its divisors is an integer number (606616010607).

Almost surely, 2^{1213232021213} is an apocalyptic number.

It is an amenable number.

1213232021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213232021213 is an equidigital number, since it uses as much as digits as its factorization.

1213232021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1213232021213 its reverse (3121202323121), we get a palindrome (4334434344334).

The spelling of 1213232021213 in words is "one trillion, two hundred thirteen billion, two hundred thirty-two million, twenty-one thousand, two hundred thirteen".