12200201021 has 4 divisors (see below), whose sum is σ = 12206514492. Its totient is φ = 12193887552.

The previous prime is 12200201009. The next prime is 12200201077. The reversal of 12200201021 is 12010200221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12010200221 = 8419 ⋅1426559.

It can be written as a sum of positive squares in 2 ways, for example, as 3441112921 + 8759088100 = 58661^2 + 93590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12200201021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200200993 and 12200201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200201821) 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, 3153836 + ... + 3157701.

It is an arithmetic number, because the mean of its divisors is an integer number (3051628623).

Almost surely, 2^12200201021 is an apocalyptic number.

It is an amenable number.

12200201021 is a deficient number, since it is larger than the sum of its proper divisors (6313471).

12200201021 is an equidigital number, since it uses as much as digits as its factorization.

12200201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313470.

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

Adding to 12200201021 its reverse (12010200221), we get a palindrome (24210401242).

The spelling of 12200201021 in words is "twelve billion, two hundred million, two hundred one thousand, twenty-one".