1213430033 has 4 divisors (see below), whose sum is σ = 1215390960. Its totient is φ = 1211469108.

The previous prime is 1213430011. The next prime is 1213430039. The reversal of 1213430033 is 3300343121.

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: 3300343121 = 59 ⋅55938019.

It is a cyclic number.

It is not a de Polignac number, because 1213430033 - 2²⁸ = 944994577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1213429987 and 1213430014.

It is not an unprimeable number, because it can be changed into a prime (1213430039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 979535 + ... + 980772.

It is an arithmetic number, because the mean of its divisors is an integer number (303847740).

Almost surely, 2^1213430033 is an apocalyptic number.

It is an amenable number.

1213430033 is a deficient number, since it is larger than the sum of its proper divisors (1960927).

1213430033 is an equidigital number, since it uses as much as digits as its factorization.

1213430033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960926.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1213430033 is about 34834.3226286948. The cubic root of 1213430033 is about 1066.6081878856.

Adding to 1213430033 its reverse (3300343121), we get a palindrome (4513773154).

The spelling of 1213430033 in words is "one billion, two hundred thirteen million, four hundred thirty thousand, thirty-three".