21133233233111 has 4 divisors (see below), whose sum is σ = 21370685292000. Its totient is φ = 20895781174224.

The previous prime is 21133233233071. The next prime is 21133233233129. The reversal of 21133233233111 is 11133233233112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21133233233111 is a prime.

It is a super-2 number, since 2×21133233233111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133233233141) 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, 118726029311 + ... + 118726029488.

It is an arithmetic number, because the mean of its divisors is an integer number (5342671323000).

Almost surely, 2^{21133233233111} is an apocalyptic number.

21133233233111 is a deficient number, since it is larger than the sum of its proper divisors (237452058889).

21133233233111 is an equidigital number, since it uses as much as digits as its factorization.

21133233233111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237452058888.

The product of its digits is 5832, while the sum is 29.

Adding to 21133233233111 its reverse (11133233233112), we get a palindrome (32266466466223).

Subtracting from 21133233233111 its reverse (11133233233112), we obtain a palindrome (9999999999999).

The spelling of 21133233233111 in words is "twenty-one trillion, one hundred thirty-three billion, two hundred thirty-three million, two hundred thirty-three thousand, one hundred eleven".