20111002222111 has 4 divisors (see below), whose sum is σ = 20111012855224. Its totient is φ = 20110991589000.

The previous prime is 20111002222067. The next prime is 20111002222117. The reversal of 20111002222111 is 11122220011102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20111002222111 - 2¹¹ = 20111002220063 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 (20111002222117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1625205 + ... + 6547006.

It is an arithmetic number, because the mean of its divisors is an integer number (5027753213806).

Almost surely, 2^{20111002222111} is an apocalyptic number.

20111002222111 is a deficient number, since it is larger than the sum of its proper divisors (10633113).

20111002222111 is an equidigital number, since it uses as much as digits as its factorization.

20111002222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10633112.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20111002222111 its reverse (11122220011102), we get a palindrome (31233222233213).

The spelling of 20111002222111 in words is "twenty trillion, one hundred eleven billion, two million, two hundred twenty-two thousand, one hundred eleven".