20111120110121 has 16 divisors (see below), whose sum is σ = 21865336214400. Its totient is φ = 18439766704128.

The previous prime is 20111120110099. The next prime is 20111120110201. The reversal of 20111120110121 is 12101102111102.

It is a de Polignac number, because none of the positive numbers 2^k-20111120110121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20111120110096 and 20111120110105.

It is not an unprimeable number, because it can be changed into a prime (20111120116121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108366296 + ... + 108551721.

It is an arithmetic number, because the mean of its divisors is an integer number (1366583513400).

Almost surely, 2^{20111120110121} is an apocalyptic number.

It is an amenable number.

20111120110121 is a deficient number, since it is larger than the sum of its proper divisors (1754216104279).

20111120110121 is a wasteful number, since it uses less digits than its factorization.

20111120110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216918208.

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

Adding to 20111120110121 its reverse (12101102111102), we get a palindrome (32212222221223).

The spelling of 20111120110121 in words is "twenty trillion, one hundred eleven billion, one hundred twenty million, one hundred ten thousand, one hundred twenty-one".