1212120321133 has 4 divisors (see below), whose sum is σ = 1212141766528. Its totient is φ = 1212098875740.

The previous prime is 1212120321127. The next prime is 1212120321161. The reversal of 1212120321133 is 3311230212121.

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 1212120321133 - 2²⁹ = 1211583450221 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 (1212120324133) 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, 10637691 + ... + 10751032.

It is an arithmetic number, because the mean of its divisors is an integer number (303035441632).

Almost surely, 2^{1212120321133} is an apocalyptic number.

It is an amenable number.

1212120321133 is a deficient number, since it is larger than the sum of its proper divisors (21445395).

1212120321133 is an equidigital number, since it uses as much as digits as its factorization.

1212120321133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21445394.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1212120321133 its reverse (3311230212121), we get a palindrome (4523350533254).

The spelling of 1212120321133 in words is "one trillion, two hundred twelve billion, one hundred twenty million, three hundred twenty-one thousand, one hundred thirty-three".