21213233321111 has 32 divisors (see below), whose sum is σ = 25462661898240. Its totient is φ = 17459124217344.

The previous prime is 21213233321107. The next prime is 21213233321131. The reversal of 21213233321111 is 11112333231212.

It is a cyclic number.

It is not a de Polignac number, because 21213233321111 - 2² = 21213233321107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213233321131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271984826 + ... + 272062808.

It is an arithmetic number, because the mean of its divisors is an integer number (795708184320).

Almost surely, 2^{21213233321111} is an apocalyptic number.

21213233321111 is a deficient number, since it is larger than the sum of its proper divisors (4249428577129).

21213233321111 is a wasteful number, since it uses less digits than its factorization.

21213233321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142815.

The product of its digits is 1296, while the sum is 26.

Adding to 21213233321111 its reverse (11112333231212), we get a palindrome (32325566552323).

The spelling of 21213233321111 in words is "twenty-one trillion, two hundred thirteen billion, two hundred thirty-three million, three hundred twenty-one thousand, one hundred eleven".