21110011202011 has 4 divisors (see below), whose sum is σ = 21837942622800. Its totient is φ = 20382079781224.

The previous prime is 21110011201999. The next prime is 21110011202051. The reversal of 21110011202011 is 11020211001112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21110011202011 - 2¹⁵ = 21110011169243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110011201982 and 21110011202000.

It is not an unprimeable number, because it can be changed into a prime (21110011202051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363965710351 + ... + 363965710408.

It is an arithmetic number, because the mean of its divisors is an integer number (5459485655700).

Almost surely, 2^{21110011202011} is an apocalyptic number.

21110011202011 is a deficient number, since it is larger than the sum of its proper divisors (727931420789).

21110011202011 is an equidigital number, since it uses as much as digits as its factorization.

21110011202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727931420788.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21110011202011 its reverse (11020211001112), we get a palindrome (32130222203123).

The spelling of 21110011202011 in words is "twenty-one trillion, one hundred ten billion, eleven million, two hundred two thousand, eleven".