21210211220011 has 8 divisors (see below), whose sum is σ = 23139640684800. Its totient is φ = 19280986496040.

The previous prime is 21210211219999. The next prime is 21210211220069. The reversal of 21210211220011 is 11002211201212.

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 21210211220011 - 2¹¹ = 21210211217963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210211220711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50968551 + ... + 51383008.

It is an arithmetic number, because the mean of its divisors is an integer number (2892455085600).

Almost surely, 2^{21210211220011} is an apocalyptic number.

21210211220011 is a deficient number, since it is larger than the sum of its proper divisors (1929429464789).

21210211220011 is a wasteful number, since it uses less digits than its factorization.

21210211220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102370409.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21210211220011 its reverse (11002211201212), we get a palindrome (32212422421223).

The spelling of 21210211220011 in words is "twenty-one trillion, two hundred ten billion, two hundred eleven million, two hundred twenty thousand, eleven".