21212000311 has 8 divisors (see below), whose sum is σ = 22706870400. Its totient is φ = 19754975160.

The previous prime is 21212000287. The next prime is 21212000317. The reversal of 21212000311 is 11300021212.

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 21212000311 - 2⁵ = 21212000279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21212000291 and 21212000300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212000317) 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, 9460075 + ... + 9462316.

It is an arithmetic number, because the mean of its divisors is an integer number (2838358800).

Almost surely, 2^21212000311 is an apocalyptic number.

21212000311 is a deficient number, since it is larger than the sum of its proper divisors (1494870089).

21212000311 is a wasteful number, since it uses less digits than its factorization.

21212000311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18922469.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21212000311 its reverse (11300021212), we get a palindrome (32512021523).

The spelling of 21212000311 in words is "twenty-one billion, two hundred twelve million, three hundred eleven", and thus it is an aban number.