20110001220111 has 24 divisors (see below), whose sum is σ = 29517096786352. Its totient is φ = 12169440835200.

The previous prime is 20110001220083. The next prime is 20110001220119. The reversal of 20110001220111 is 11102210001102.

It is not a de Polignac number, because 20110001220111 - 2¹¹ = 20110001218063 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 (20110001220119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41665846 + ... + 42145731.

Almost surely, 2^{20110001220111} is an apocalyptic number.

20110001220111 is a deficient number, since it is larger than the sum of its proper divisors (9407095566241).

20110001220111 is a wasteful number, since it uses less digits than its factorization.

20110001220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83812263 (or 83812252 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20110001220111 its reverse (11102210001102), we get a palindrome (31212211221213).

The spelling of 20110001220111 in words is "twenty trillion, one hundred ten billion, one million, two hundred twenty thousand, one hundred eleven".