12121021112011 has 16 divisors (see below), whose sum is σ = 14979527617536. Its totient is φ = 9570253746816.

The previous prime is 12121021112003. The next prime is 12121021112033. The reversal of 12121021112011 is 11021112012121.

It is not a de Polignac number, because 12121021112011 - 2³ = 12121021112003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121021112071) 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, 1083582921 + ... + 1083594106.

It is an arithmetic number, because the mean of its divisors is an integer number (936220476096).

Almost surely, 2^{12121021112011} is an apocalyptic number.

12121021112011 is a deficient number, since it is larger than the sum of its proper divisors (2858506505525).

12121021112011 is a wasteful number, since it uses less digits than its factorization.

12121021112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167177098.

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

Adding to 12121021112011 its reverse (11021112012121), we get a palindrome (23142133124132).

The spelling of 12121021112011 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, one hundred twelve thousand, eleven".