12021002021021 has 4 divisors (see below), whose sum is σ = 13738288024032. Its totient is φ = 10303716018012.

The previous prime is 12021002020991. The next prime is 12021002021123. The reversal of 12021002021021 is 12012020012021.

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 a de Polignac number, because none of the positive numbers 2^k-12021002021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021002020987 and 12021002021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021002021221) 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, 858643001495 + ... + 858643001508.

It is an arithmetic number, because the mean of its divisors is an integer number (3434572006008).

Almost surely, 2^{12021002021021} is an apocalyptic number.

It is an amenable number.

12021002021021 is a deficient number, since it is larger than the sum of its proper divisors (1717286003011).

12021002021021 is an equidigital number, since it uses as much as digits as its factorization.

12021002021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717286003010.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12021002021021 its reverse (12012020012021), we get a palindrome (24033022033042).

The spelling of 12021002021021 in words is "twelve trillion, twenty-one billion, two million, twenty-one thousand, twenty-one".