1212132331213 has 4 divisors (see below), whose sum is σ = 1215248353020. Its totient is φ = 1209016309408.

The previous prime is 1212132331187. The next prime is 1212132331219. The reversal of 1212132331213 is 3121332312121.

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 746629061929 + 465503269284 = 864077^2 + 682278^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212132331213 - 2³³ = 1203542396621 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 (1212132331219) 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, 1558010320 + ... + 1558011097.

It is an arithmetic number, because the mean of its divisors is an integer number (303812088255).

Almost surely, 2^{1212132331213} is an apocalyptic number.

It is an amenable number.

1212132331213 is a deficient number, since it is larger than the sum of its proper divisors (3116021807).

1212132331213 is an equidigital number, since it uses as much as digits as its factorization.

1212132331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116021806.

The product of its digits is 1296, while the sum is 25.

Adding to 1212132331213 its reverse (3121332312121), we get a palindrome (4333464643334).

The spelling of 1212132331213 in words is "one trillion, two hundred twelve billion, one hundred thirty-two million, three hundred thirty-one thousand, two hundred thirteen".