1213432123 has 8 divisors (see below), whose sum is σ = 1256183280. Its totient is φ = 1170741600.

The previous prime is 1213432097. The next prime is 1213432127. The reversal of 1213432123 is 3212343121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213432123 - 2¹³ = 1213423931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213432094 and 1213432103.

It is not an unprimeable number, because it can be changed into a prime (1213432127) 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 7 ways as a sum of consecutive naturals, for example, 27661 + ... + 56497.

It is an arithmetic number, because the mean of its divisors is an integer number (157022910).

Almost surely, 2^1213432123 is an apocalyptic number.

1213432123 is a deficient number, since it is larger than the sum of its proper divisors (42751157).

1213432123 is a wasteful number, since it uses less digits than its factorization.

1213432123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30317.

The product of its digits is 864, while the sum is 22.

The square root of 1213432123 is about 34834.3526278299. The cubic root of 1213432123 is about 1066.6088002571.

Adding to 1213432123 its reverse (3212343121), we get a palindrome (4425775244).

The spelling of 1213432123 in words is "one billion, two hundred thirteen million, four hundred thirty-two thousand, one hundred twenty-three".