21223020312133 has 4 divisors (see below), whose sum is σ = 22145760325728. Its totient is φ = 20300280298540.

The previous prime is 21223020312103. The next prime is 21223020312139. The reversal of 21223020312133 is 33121302032212.

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 21223020312133 - 2⁹ = 21223020311621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223020312098 and 21223020312107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223020312139) 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 3 ways as a sum of consecutive naturals, for example, 461370006763 + ... + 461370006808.

It is an arithmetic number, because the mean of its divisors is an integer number (5536440081432).

Almost surely, 2^{21223020312133} is an apocalyptic number.

21223020312133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21223020312133 is a deficient number, since it is larger than the sum of its proper divisors (922740013595).

21223020312133 is an equidigital number, since it uses as much as digits as its factorization.

21223020312133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922740013594.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21223020312133 its reverse (33121302032212), we get a palindrome (54344322344345).

The spelling of 21223020312133 in words is "twenty-one trillion, two hundred twenty-three billion, twenty million, three hundred twelve thousand, one hundred thirty-three".