21211022311 has 2 divisors, whose sum is σ = 21211022312.
Its totient is φ = 21211022310.
The previous prime is 21211022177. The next prime is 21211022317. The reversal of 21211022311 is 11322011212.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 21211022311 - 213 = 21211014119 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (21211022317) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605511155 + 10605511156.
It is an arithmetic number, because the mean of its divisors is an integer number (10605511156).
Almost surely, 221211022311 is an apocalyptic number.
21211022311 is a deficient number, since it is larger than the sum of its proper divisors (1).
21211022311 is an equidigital number, since it uses as much as digits as its factorization.
21211022311 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 48, while the sum is 16.
Adding to 21211022311 its reverse (11322011212), we get a palindrome (32533033523).
The spelling of 21211022311 in words is "twenty-one billion, two hundred eleven million, twenty-two thousand, three hundred eleven".