12000022210021 has 4 divisors (see below), whose sum is σ = 12705905869452. Its totient is φ = 11294138550592.

The previous prime is 12000022210013. The next prime is 12000022210031. The reversal of 12000022210021 is 12001222000021.

It is a happy number.

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 7928949273921 + 4071072936100 = 2815839^2 + 2017690^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000022210021 - 2³ = 12000022210013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000022209983 and 12000022210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000022210031) 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, 352941829690 + ... + 352941829723.

It is an arithmetic number, because the mean of its divisors is an integer number (3176476467363).

Almost surely, 2^{12000022210021} is an apocalyptic number.

It is an amenable number.

12000022210021 is a deficient number, since it is larger than the sum of its proper divisors (705883659431).

12000022210021 is an equidigital number, since it uses as much as digits as its factorization.

12000022210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705883659430.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12000022210021 its reverse (12001222000021), we get a palindrome (24001244210042).

The spelling of 12000022210021 in words is "twelve trillion, twenty-two million, two hundred ten thousand, twenty-one".