21212000223311 has 8 divisors (see below), whose sum is σ = 21215084230560. Its totient is φ = 21208916422368.

The previous prime is 21212000223283. The next prime is 21212000223313. The reversal of 21212000223311 is 11332200021212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21212000223311 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 (21212000223313) 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, 427662365 + ... + 427711961.

It is an arithmetic number, because the mean of its divisors is an integer number (2651885528820).

Almost surely, 2^{21212000223311} is an apocalyptic number.

21212000223311 is a deficient number, since it is larger than the sum of its proper divisors (3084007249).

21212000223311 is an equidigital number, since it uses as much as digits as its factorization.

21212000223311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103153.

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

Adding to 21212000223311 its reverse (11332200021212), we get a palindrome (32544200244523).

The spelling of 21212000223311 in words is "twenty-one trillion, two hundred twelve billion, two hundred twenty-three thousand, three hundred eleven".