21230011331333 has 4 divisors (see below), whose sum is σ = 24262870092960. Its totient is φ = 18197152569708.

The previous prime is 21230011331311. The next prime is 21230011331357. The reversal of 21230011331333 is 33313311003212.

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 not a de Polignac number, because 21230011331333 - 2²⁶ = 21229944222469 is a prime.

It is a super-2 number, since 2×21230011331333² (a number of 27 digits) contains 22 as substring.

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 (21230011331383) 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, 1516429380803 + ... + 1516429380816.

It is an arithmetic number, because the mean of its divisors is an integer number (6065717523240).

Almost surely, 2^{21230011331333} is an apocalyptic number.

It is an amenable number.

21230011331333 is a deficient number, since it is larger than the sum of its proper divisors (3032858761627).

21230011331333 is an equidigital number, since it uses as much as digits as its factorization.

21230011331333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032858761626.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21230011331333 its reverse (33313311003212), we get a palindrome (54543322334545).

The spelling of 21230011331333 in words is "twenty-one trillion, two hundred thirty billion, eleven million, three hundred thirty-one thousand, three hundred thirty-three".