21211002311 has 8 divisors (see below), whose sum is σ = 21942738048. Its totient is φ = 20482236000.

The previous prime is 21211002271. The next prime is 21211002313. The reversal of 21211002311 is 11320011212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21211002311 - 2¹⁴ = 21210985927 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 (21211002313) 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 in 7 ways as a sum of consecutive naturals, for example, 727820 + ... + 756401.

It is an arithmetic number, because the mean of its divisors is an integer number (2742842256).

Almost surely, 2^21211002311 is an apocalyptic number.

21211002311 is a deficient number, since it is larger than the sum of its proper divisors (731735737).

21211002311 is a wasteful number, since it uses less digits than its factorization.

21211002311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484713.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21211002311 its reverse (11320011212), we get a palindrome (32531013523).

The spelling of 21211002311 in words is "twenty-one billion, two hundred eleven million, two thousand, three hundred eleven".