21133213331311 has 16 divisors (see below), whose sum is σ = 21292444200960. Its totient is φ = 20974452085440.

The previous prime is 21133213331309. The next prime is 21133213331341. The reversal of 21133213331311 is 11313331233112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21133213331311 - 2¹ = 21133213331309 is a prime.

It is a super-2 number, since 2×21133213331311² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21133213331311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133213331341) 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, 829684306 + ... + 829709776.

It is an arithmetic number, because the mean of its divisors is an integer number (1330777762560).

Almost surely, 2^{21133213331311} is an apocalyptic number.

21133213331311 is a deficient number, since it is larger than the sum of its proper divisors (159230869649).

21133213331311 is a wasteful number, since it uses less digits than its factorization.

21133213331311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34446.

The product of its digits is 2916, while the sum is 28.

Adding to 21133213331311 its reverse (11313331233112), we get a palindrome (32446544564423).

The spelling of 21133213331311 in words is "twenty-one trillion, one hundred thirty-three billion, two hundred thirteen million, three hundred thirty-one thousand, three hundred eleven".