12121021002011 has 4 divisors (see below), whose sum is σ = 12183824219832. Its totient is φ = 12058217784192.

The previous prime is 12121021001993. The next prime is 12121021002049. The reversal of 12121021002011 is 11020012012121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12121021002011 - 2¹⁰ = 12121021000987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121021002061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31401608621 + ... + 31401609006.

It is an arithmetic number, because the mean of its divisors is an integer number (3045956054958).

Almost surely, 2^{12121021002011} is an apocalyptic number.

12121021002011 is a deficient number, since it is larger than the sum of its proper divisors (62803217821).

12121021002011 is an equidigital number, since it uses as much as digits as its factorization.

12121021002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62803217820.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12121021002011 its reverse (11020012012121), we get a palindrome (23141033014132).

The spelling of 12121021002011 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, two thousand, eleven".