21412121233 has 4 divisors (see below), whose sum is σ = 21731705200. Its totient is φ = 21092537268.

The previous prime is 21412121221. The next prime is 21412121273. The reversal of 21412121233 is 33212121412.

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.

It is a cyclic number.

It is not a de Polignac number, because 21412121233 - 2²⁹ = 20875250321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21412121273) 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, 159791883 + ... + 159792016.

It is an arithmetic number, because the mean of its divisors is an integer number (5432926300).

Almost surely, 2^21412121233 is an apocalyptic number.

It is an amenable number.

21412121233 is a deficient number, since it is larger than the sum of its proper divisors (319583967).

21412121233 is an equidigital number, since it uses as much as digits as its factorization.

21412121233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319583966.

The product of its digits is 576, while the sum is 22.

Adding to 21412121233 its reverse (33212121412), we get a palindrome (54624242645).

The spelling of 21412121233 in words is "twenty-one billion, four hundred twelve million, one hundred twenty-one thousand, two hundred thirty-three".