12021120111001 has 4 divisors (see below), whose sum is σ = 12115774600192. Its totient is φ = 11926465621812.

The previous prime is 12021120110971. The next prime is 12021120111017. The reversal of 12021120111001 is 10011102112021.

It is a happy number.

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 not a de Polignac number, because 12021120111001 - 2¹¹ = 12021120108953 is a prime.

It is a super-2 number, since 2×12021120111001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021120111041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47327244405 + ... + 47327244658.

It is an arithmetic number, because the mean of its divisors is an integer number (3028943650048).

Almost surely, 2^{12021120111001} is an apocalyptic number.

It is an amenable number.

12021120111001 is a deficient number, since it is larger than the sum of its proper divisors (94654489191).

12021120111001 is an equidigital number, since it uses as much as digits as its factorization.

12021120111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94654489190.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12021120111001 its reverse (10011102112021), we get a palindrome (22032222223022).

The spelling of 12021120111001 in words is "twelve trillion, twenty-one billion, one hundred twenty million, one hundred eleven thousand, one".