1321232012213 has 4 divisors (see below), whose sum is σ = 1321235201280. Its totient is φ = 1321228823148.

The previous prime is 1321232012203. The next prime is 1321232012263. The reversal of 1321232012213 is 3122102321231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1321232012213 - 2²⁶ = 1321164903349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321232012203) 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, 860423 + ... + 1839236.

It is an arithmetic number, because the mean of its divisors is an integer number (330308800320).

Almost surely, 2^{1321232012213} is an apocalyptic number.

It is an amenable number.

1321232012213 is a deficient number, since it is larger than the sum of its proper divisors (3189067).

1321232012213 is an equidigital number, since it uses as much as digits as its factorization.

1321232012213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189066.

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

Adding to 1321232012213 its reverse (3122102321231), we get a palindrome (4443334333444).

The spelling of 1321232012213 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-two million, twelve thousand, two hundred thirteen".