21233111133211 has 16 divisors (see below), whose sum is σ = 21443693813568. Its totient is φ = 21022936704000.

The previous prime is 21233111133197. The next prime is 21233111133251. The reversal of 21233111133211 is 11233111133212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233111133211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233111133251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509887951 + ... + 509929591.

It is an arithmetic number, because the mean of its divisors is an integer number (1340230863348).

Almost surely, 2^{21233111133211} is an apocalyptic number.

21233111133211 is a deficient number, since it is larger than the sum of its proper divisors (210582680357).

21233111133211 is a wasteful number, since it uses less digits than its factorization.

21233111133211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46422.

The product of its digits is 648, while the sum is 25.

Adding to 21233111133211 its reverse (11233111133212), we get a palindrome (32466222266423).

Subtracting from 21233111133211 its reverse (11233111133212), we obtain a palindrome (9999999999999).

The spelling of 21233111133211 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred eleven million, one hundred thirty-three thousand, two hundred eleven".