21110221111011 has 8 divisors (see below), whose sum is σ = 28176873240144. Its totient is φ = 14058524861280.

The previous prime is 21110221110997. The next prime is 21110221111033. The reversal of 21110221111011 is 11011112201112.

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

It is not a de Polignac number, because 21110221111011 - 2¹⁸ = 21110220848867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110221111711) 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, 3738966556 + ... + 3738972201.

It is an arithmetic number, because the mean of its divisors is an integer number (3522109155018).

Almost surely, 2^{21110221111011} is an apocalyptic number.

21110221111011 is a deficient number, since it is larger than the sum of its proper divisors (7066652129133).

21110221111011 is an equidigital number, since it uses as much as digits as its factorization.

21110221111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7477939701.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 21110221111011 its reverse (11011112201112), we get a palindrome (32121333312123).

The spelling of 21110221111011 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-one million, one hundred eleven thousand, eleven".