20111011120121 has 4 divisors (see below), whose sum is σ = 20111228904192. Its totient is φ = 20110793336052.

The previous prime is 20111011120103. The next prime is 20111011120129. The reversal of 20111011120121 is 12102111011102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20111011120121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111011120096 and 20111011120105.

It is not an unprimeable number, because it can be changed into a prime (20111011120129) 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, 108753461 + ... + 108938226.

It is an arithmetic number, because the mean of its divisors is an integer number (5027807226048).

Almost surely, 2^{20111011120121} is an apocalyptic number.

It is an amenable number.

20111011120121 is a deficient number, since it is larger than the sum of its proper divisors (217784071).

20111011120121 is an equidigital number, since it uses as much as digits as its factorization.

20111011120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217784070.

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

Adding to 20111011120121 its reverse (12102111011102), we get a palindrome (32213122131223).

The spelling of 20111011120121 in words is "twenty trillion, one hundred eleven billion, eleven million, one hundred twenty thousand, one hundred twenty-one".