12021001110021 has 16 divisors (see below), whose sum is σ = 16037986794368. Its totient is φ = 8009009568000.

The previous prime is 12021001110017. The next prime is 12021001110029. The reversal of 12021001110021 is 12001110012021.

It is not a de Polignac number, because 12021001110021 - 2² = 12021001110017 is a prime.

It is a super-2 number, since 2×12021001110021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021001109979 and 12021001110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021001110029) 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 15 ways as a sum of consecutive naturals, for example, 32799816 + ... + 33164286.

It is an arithmetic number, because the mean of its divisors is an integer number (1002374174648).

Almost surely, 2^{12021001110021} is an apocalyptic number.

It is an amenable number.

12021001110021 is a deficient number, since it is larger than the sum of its proper divisors (4016985684347).

12021001110021 is a wasteful number, since it uses less digits than its factorization.

12021001110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371292.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12021001110021 its reverse (12001110012021), we get a palindrome (24022111122042).

The spelling of 12021001110021 in words is "twelve trillion, twenty-one billion, one million, one hundred ten thousand, twenty-one".