21111011220011 has 8 divisors (see below), whose sum is σ = 21134475142848. Its totient is φ = 21087547936000.

The previous prime is 21111011219999. The next prime is 21111011220041. The reversal of 21111011220011 is 11002211011112.

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 21111011220011 - 2⁴² = 16712964708907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111011220041) 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, 102367181 + ... + 102573201.

It is an arithmetic number, because the mean of its divisors is an integer number (2641809392856).

Almost surely, 2^{21111011220011} is an apocalyptic number.

21111011220011 is a deficient number, since it is larger than the sum of its proper divisors (23463922837).

21111011220011 is a wasteful number, since it uses less digits than its factorization.

21111011220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319413.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21111011220011 its reverse (11002211011112), we get a palindrome (32113222231123).

The spelling of 21111011220011 in words is "twenty-one trillion, one hundred eleven billion, eleven million, two hundred twenty thousand, eleven".