12001222313021 has 4 divisors (see below), whose sum is σ = 12022314092700. Its totient is φ = 11980130533344.

The previous prime is 12001222313011. The next prime is 12001222313071. The reversal of 12001222313021 is 12031322210021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1351534128025 + 10649688184996 = 1162555^2 + 3263386^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001222313021 - 2⁶ = 12001222312957 is a prime.

It is a super-2 number, since 2×12001222313021² (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 = 12001222312984 and 12001222313002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001222313011) 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, 10545888986 + ... + 10545890123.

It is an arithmetic number, because the mean of its divisors is an integer number (3005578523175).

Almost surely, 2^{12001222313021} is an apocalyptic number.

It is an amenable number.

12001222313021 is a deficient number, since it is larger than the sum of its proper divisors (21091779679).

12001222313021 is an equidigital number, since it uses as much as digits as its factorization.

12001222313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21091779678.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12001222313021 its reverse (12031322210021), we get a palindrome (24032544523042).

The spelling of 12001222313021 in words is "twelve trillion, one billion, two hundred twenty-two million, three hundred thirteen thousand, twenty-one".