12001021011111 has 16 divisors (see below), whose sum is σ = 17483263089408. Its totient is φ = 7261999180800.

The previous prime is 12001021011043. The next prime is 12001021011113. The reversal of 12001021011111 is 11111012010021.

It is not a de Polignac number, because 12001021011111 - 2¹⁰ = 12001021010087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001021011113) 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, 283650691 + ... + 283692996.

It is an arithmetic number, because the mean of its divisors is an integer number (1092703943088).

Almost surely, 2^{12001021011111} is an apocalyptic number.

12001021011111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12001021011111 is a deficient number, since it is larger than the sum of its proper divisors (5482242078297).

12001021011111 is a wasteful number, since it uses less digits than its factorization.

12001021011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567344342.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12001021011111 its reverse (11111012010021), we get a palindrome (23112033021132).

The spelling of 12001021011111 in words is "twelve trillion, one billion, twenty-one million, eleven thousand, one hundred eleven".