1213543252133 has 4 divisors (see below), whose sum is σ = 1215522931788. Its totient is φ = 1211563572480.

The previous prime is 1213543252121. The next prime is 1213543252217. The reversal of 1213543252133 is 3312523453121.

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 138418970209 + 1075124281924 = 372047^2 + 1036882^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213543252133 - 2⁶ = 1213543252069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213543252093 and 1213543252102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213543252333) 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, 989838908 + ... + 989840133.

It is an arithmetic number, because the mean of its divisors is an integer number (303880732947).

Almost surely, 2^{1213543252133} is an apocalyptic number.

It is an amenable number.

1213543252133 is a deficient number, since it is larger than the sum of its proper divisors (1979679655).

1213543252133 is an equidigital number, since it uses as much as digits as its factorization.

1213543252133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979679654.

The product of its digits is 64800, while the sum is 35.

The spelling of 1213543252133 in words is "one trillion, two hundred thirteen billion, five hundred forty-three million, two hundred fifty-two thousand, one hundred thirty-three".