20121120110011 has 4 divisors (see below), whose sum is σ = 20121131597400. Its totient is φ = 20121108622624.

The previous prime is 20121120109973. The next prime is 20121120110023. The reversal of 20121120110011 is 11001102112102.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-20121120110011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121120109973 and 20121120110000.

It is not an unprimeable number, because it can be changed into a prime (20121120113011) 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, 2509141 + ... + 6821878.

It is an arithmetic number, because the mean of its divisors is an integer number (5030282899350).

Almost surely, 2^{20121120110011} is an apocalyptic number.

20121120110011 is a deficient number, since it is larger than the sum of its proper divisors (11487389).

20121120110011 is an equidigital number, since it uses as much as digits as its factorization.

20121120110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487388.

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

Adding to 20121120110011 its reverse (11001102112102), we get a palindrome (31122222222113).

The spelling of 20121120110011 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, one hundred ten thousand, eleven".