21110011022111 has 4 divisors (see below), whose sum is σ = 23029102933224. Its totient is φ = 19190919111000.

The previous prime is 21110011022081. The next prime is 21110011022137. The reversal of 21110011022111 is 11122011001112.

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 21110011022111 - 2¹⁰ = 21110011021087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110011022311) 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, 959545955540 + ... + 959545955561.

It is an arithmetic number, because the mean of its divisors is an integer number (5757275733306).

Almost surely, 2^{21110011022111} is an apocalyptic number.

21110011022111 is a deficient number, since it is larger than the sum of its proper divisors (1919091911113).

21110011022111 is a wasteful number, since it uses less digits than its factorization.

21110011022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919091911112.

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

Adding to 21110011022111 its reverse (11122011001112), we get a palindrome (32232022023223).

It can be divided in two parts, 211100 and 11022111, that added together give a palindrome (11233211).

The spelling of 21110011022111 in words is "twenty-one trillion, one hundred ten billion, eleven million, twenty-two thousand, one hundred eleven".