2133431434421 has 6 divisors (see below), whose sum is σ = 2481746770710. Its totient is φ = 1828655515176.

The previous prime is 2133431434417. The next prime is 2133431434429. The reversal of 2133431434421 is 1244341343312.

It can be written as a sum of positive squares in only one way, i.e., 1603427050225 + 530004384196 = 1266265^2 + 728014^2 .

It is not a de Polignac number, because 2133431434421 - 2² = 2133431434417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133431434429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21769708466 + ... + 21769708563.

It is an arithmetic number, because the mean of its divisors is an integer number (413624461785).

Almost surely, 2^{2133431434421} is an apocalyptic number.

It is an amenable number.

2133431434421 is a deficient number, since it is larger than the sum of its proper divisors (348315336289).

2133431434421 is an equidigital number, since it uses as much as digits as its factorization.

2133431434421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43539417043 (or 43539417036 counting only the distinct ones).

The product of its digits is 82944, while the sum is 35.

Adding to 2133431434421 its reverse (1244341343312), we get a palindrome (3377772777733).

The spelling of 2133431434421 in words is "two trillion, one hundred thirty-three billion, four hundred thirty-one million, four hundred thirty-four thousand, four hundred twenty-one".