12200210021 has 4 divisors (see below), whose sum is σ = 12917869452. Its totient is φ = 11482550592.

The previous prime is 12200209969. The next prime is 12200210047. The reversal of 12200210021 is 12001200221.

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 5592796225 + 6607413796 = 74785^2 + 81286^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200210021 - 2²² = 12196015717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200209984 and 12200210011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200210621) 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, 358829690 + ... + 358829723.

It is an arithmetic number, because the mean of its divisors is an integer number (3229467363).

Almost surely, 2^12200210021 is an apocalyptic number.

It is an amenable number.

12200210021 is a deficient number, since it is larger than the sum of its proper divisors (717659431).

12200210021 is an equidigital number, since it uses as much as digits as its factorization.

12200210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717659430.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12200210021 its reverse (12001200221), we get a palindrome (24201410242).

The spelling of 12200210021 in words is "twelve billion, two hundred million, two hundred ten thousand, twenty-one".