21311211131332 has 24 divisors (see below), whose sum is σ = 37390976481600. Its totient is φ = 10628100863136.

The previous prime is 21311211131281. The next prime is 21311211131333. The reversal of 21311211131332 is 23313111211312.

It is a junction number, because it is equal to n+sod(n) for n = 21311211131297 and 21311211131306.

It is not an unprimeable number, because it can be changed into a prime (21311211131333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63673 + ... + 6528895.

It is an arithmetic number, because the mean of its divisors is an integer number (1557957353400).

Almost surely, 2^{21311211131332} is an apocalyptic number.

It is an amenable number.

21311211131332 is a deficient number, since it is larger than the sum of its proper divisors (16079765350268).

21311211131332 is a wasteful number, since it uses less digits than its factorization.

21311211131332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6467355 (or 6467353 counting only the distinct ones).

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

Adding to 21311211131332 its reverse (23313111211312), we get a palindrome (44624322342644).

The spelling of 21311211131332 in words is "twenty-one trillion, three hundred eleven billion, two hundred eleven million, one hundred thirty-one thousand, three hundred thirty-two".