12001111101021 has 16 divisors (see below), whose sum is σ = 18327076403328. Its totient is φ = 6842901892800.

The previous prime is 12001111100999. The next prime is 12001111101037. The reversal of 12001111101021 is 12010111110021.

It is not a de Polignac number, because 12001111101021 - 2⁵ = 12001111100989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001111100988 and 12001111101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001111101061) 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, 619818390 + ... + 619837751.

It is an arithmetic number, because the mean of its divisors is an integer number (1145442275208).

Almost surely, 2^{12001111101021} is an apocalyptic number.

It is an amenable number.

12001111101021 is a deficient number, since it is larger than the sum of its proper divisors (6325965302307).

12001111101021 is a wasteful number, since it uses less digits than its factorization.

12001111101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239656612.

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

Adding to 12001111101021 its reverse (12010111110021), we get a palindrome (24011222211042).

The spelling of 12001111101021 in words is "twelve trillion, one billion, one hundred eleven million, one hundred one thousand, twenty-one".