1212342533 has 4 divisors (see below), whose sum is σ = 1212510720. Its totient is φ = 1212174348.

The previous prime is 1212342529. The next prime is 1212342553. The reversal of 1212342533 is 3352432121.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3352432121 = 47 ⋅71328343.

It is a cyclic number.

It is not a de Polignac number, because 1212342533 - 2² = 1212342529 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 (1212342553) 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, 72773 + ... + 87866.

It is an arithmetic number, because the mean of its divisors is an integer number (303127680).

Almost surely, 2^1212342533 is an apocalyptic number.

It is an amenable number.

1212342533 is a deficient number, since it is larger than the sum of its proper divisors (168187).

1212342533 is an equidigital number, since it uses as much as digits as its factorization.

1212342533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168186.

The product of its digits is 4320, while the sum is 26.

The square root of 1212342533 is about 34818.7095251964. The cubic root of 1212342533 is about 1066.2894541955.

Adding to 1212342533 its reverse (3352432121), we get a palindrome (4564774654).

The spelling of 1212342533 in words is "one billion, two hundred twelve million, three hundred forty-two thousand, five hundred thirty-three".