21223665121433 has 4 divisors (see below), whose sum is σ = 21223743988608. Its totient is φ = 21223586254260.

The previous prime is 21223665121397. The next prime is 21223665121459. The reversal of 21223665121433 is 33412156632212.

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 21223665121433 - 2¹⁰ = 21223665120409 is a prime.

It is a super-2 number, since 2×21223665121433² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223665121933) 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 3 ways as a sum of consecutive naturals, for example, 39028541 + ... + 39568602.

It is an arithmetic number, because the mean of its divisors is an integer number (5305935997152).

Almost surely, 2^{21223665121433} is an apocalyptic number.

It is an amenable number.

21223665121433 is a deficient number, since it is larger than the sum of its proper divisors (78867175).

21223665121433 is an equidigital number, since it uses as much as digits as its factorization.

21223665121433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78867174.

The product of its digits is 311040, while the sum is 41.

The spelling of 21223665121433 in words is "twenty-one trillion, two hundred twenty-three billion, six hundred sixty-five million, one hundred twenty-one thousand, four hundred thirty-three".