21233221213311 has 64 divisors (see below), whose sum is σ = 33014456616960. Its totient is φ = 13471576560000.

The previous prime is 21233221213279. The next prime is 21233221213319. The reversal of 21233221213311 is 11331212233212.

21233221213311 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 322 + 1 + 2 + 1 + 331 + 1 = 666.

It is not a de Polignac number, because 21233221213311 - 2⁵ = 21233221213279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233221213319) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76723936 + ... + 77000186.

It is an arithmetic number, because the mean of its divisors is an integer number (515850884640).

Almost surely, 2^{21233221213311} is an apocalyptic number.

21233221213311 is a deficient number, since it is larger than the sum of its proper divisors (11781235403649).

21233221213311 is a wasteful number, since it uses less digits than its factorization.

21233221213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277981 (or 277975 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 21233221213311 its reverse (11331212233212), we get a palindrome (32564433446523).

The spelling of 21233221213311 in words is "twenty-one trillion, two hundred thirty-three billion, two hundred twenty-one million, two hundred thirteen thousand, three hundred eleven".