1212133421423 has 16 divisors (see below), whose sum is σ = 1264474644480. Its totient is φ = 1160504878176.

The previous prime is 1212133421413. The next prime is 1212133421489. The reversal of 1212133421423 is 3241243312121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212133421423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212133421413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6937190 + ... + 7109772.

It is an arithmetic number, because the mean of its divisors is an integer number (79029665280).

Almost surely, 2^{1212133421423} is an apocalyptic number.

1212133421423 is a deficient number, since it is larger than the sum of its proper divisors (52341223057).

1212133421423 is a wasteful number, since it uses less digits than its factorization.

1212133421423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174646.

The product of its digits is 6912, while the sum is 29.

Adding to 1212133421423 its reverse (3241243312121), we get a palindrome (4453376733544).

The spelling of 1212133421423 in words is "one trillion, two hundred twelve billion, one hundred thirty-three million, four hundred twenty-one thousand, four hundred twenty-three".