21233111133213 has 24 divisors (see below), whose sum is σ = 35766821480000. Its totient is φ = 12133206360072.

The previous prime is 21233111133197. The next prime is 21233111133251. The reversal of 21233111133213 is 31233111133212.

21233111133213 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 311 + 1 + 1 + 332 + 13 = 666.

It is not a de Polignac number, because 21233111133213 - 2⁴ = 21233111133197 is a prime.

It is a super-3 number, since 3×21233111133213³ (a number of 41 digits) contains 333 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 (21233111133253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3439114363 + ... + 3439120536.

Almost surely, 2^{21233111133213} is an apocalyptic number.

It is an amenable number.

21233111133213 is a deficient number, since it is larger than the sum of its proper divisors (14533710346787).

21233111133213 is an equidigital number, since it uses as much as digits as its factorization.

21233111133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878234926 (or 6878234909 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

Adding to 21233111133213 its reverse (31233111133212), we get a palindrome (52466222266425).

Subtracting 21233111133213 from its reverse (31233111133212), we obtain a palindrome (9999999999999).

The spelling of 21233111133213 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred eleven million, one hundred thirty-three thousand, two hundred thirteen".