12000021110021 has 4 divisors (see below), whose sum is σ = 13714309840032. Its totient is φ = 10285732380012.

The previous prime is 12000021110017. The next prime is 12000021110071. The reversal of 12000021110021 is 12001112000021.

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 12000021110021 - 2² = 12000021110017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12000021109984 and 12000021110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000021110071) 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, 857144364995 + ... + 857144365008.

It is an arithmetic number, because the mean of its divisors is an integer number (3428577460008).

Almost surely, 2^{12000021110021} is an apocalyptic number.

It is an amenable number.

12000021110021 is a deficient number, since it is larger than the sum of its proper divisors (1714288730011).

12000021110021 is an equidigital number, since it uses as much as digits as its factorization.

12000021110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714288730010.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12000021110021 its reverse (12001112000021), we get a palindrome (24001133110042).

The spelling of 12000021110021 in words is "twelve trillion, twenty-one million, one hundred ten thousand, twenty-one".