21103111110011 has 8 divisors (see below), whose sum is σ = 24610042111200. Its totient is φ = 18088380951144.

The previous prime is 21103111109929. The next prime is 21103111110031. The reversal of 21103111110011 is 11001111130112.

It is not a de Polignac number, because 21103111110011 - 2¹⁸ = 21103110847867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103111110031) 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, 30762552296 + ... + 30762552981.

It is an arithmetic number, because the mean of its divisors is an integer number (3076255263900).

Almost surely, 2^{21103111110011} is an apocalyptic number.

21103111110011 is a deficient number, since it is larger than the sum of its proper divisors (3506931001189).

21103111110011 is an frugal number, since it uses more digits than its factorization.

21103111110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61525105298 (or 61525105284 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 14.

Adding to 21103111110011 its reverse (11001111130112), we get a palindrome (32104222240123).

The spelling of 21103111110011 in words is "twenty-one trillion, one hundred three billion, one hundred eleven million, one hundred ten thousand, eleven".