21102111113011 has 8 divisors (see below), whose sum is σ = 21162889910448. Its totient is φ = 21041412660000.

The previous prime is 21102111112997. The next prime is 21102111113063. The reversal of 21102111113011 is 11031111120112.

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 21102111113011 - 2⁹ = 21102111112499 is a prime.

It is a super-2 number, since 2×21102111113011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102111113081) 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, 19560040 + ... + 20610661.

It is an arithmetic number, because the mean of its divisors is an integer number (2645361238806).

Almost surely, 2^{21102111113011} is an apocalyptic number.

21102111113011 is a deficient number, since it is larger than the sum of its proper divisors (60778797437).

21102111113011 is an equidigital number, since it uses as much as digits as its factorization.

21102111113011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40172213.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 21102111113011 its reverse (11031111120112), we get a palindrome (32133222233123).

The spelling of 21102111113011 in words is "twenty-one trillion, one hundred two billion, one hundred eleven million, one hundred thirteen thousand, eleven".