21120212011211 has 8 divisors (see below), whose sum is σ = 21252657888000. Its totient is φ = 20988149481000.

The previous prime is 21120212011187. The next prime is 21120212011309. The reversal of 21120212011211 is 11211021202112.

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 21120212011211 - 2¹⁸ = 21120211749067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21120212011211.

It is not an unprimeable number, because it can be changed into a prime (21120212211211) 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, 95726111 + ... + 95946488.

It is an arithmetic number, because the mean of its divisors is an integer number (2656582236000).

Almost surely, 2^{21120212011211} is an apocalyptic number.

21120212011211 is a deficient number, since it is larger than the sum of its proper divisors (132445876789).

21120212011211 is a wasteful number, since it uses less digits than its factorization.

21120212011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191673289.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21120212011211 its reverse (11211021202112), we get a palindrome (32331233213323).

The spelling of 21120212011211 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, eleven thousand, two hundred eleven".