21232122311 has 2 divisors, whose sum is σ = 21232122312. Its totient is φ = 21232122310.

The previous prime is 21232122271. The next prime is 21232122313. The reversal of 21232122311 is 11322123212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232122311 - 2¹⁴ = 21232105927 is a prime.

Together with 21232122313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21232122313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616061155 + 10616061156.

It is an arithmetic number, because the mean of its divisors is an integer number (10616061156).

Almost surely, 2^21232122311 is an apocalyptic number.

21232122311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232122311 is an equidigital number, since it uses as much as digits as its factorization.

21232122311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

Adding to 21232122311 its reverse (11322123212), we get a palindrome (32554245523).

Subtracting from 21232122311 its reverse (11322123212), we obtain a palindrome (9909999099).

The spelling of 21232122311 in words is "twenty-one billion, two hundred thirty-two million, one hundred twenty-two thousand, three hundred eleven".