12020202221 has 2 divisors, whose sum is σ = 12020202222. Its totient is φ = 12020202220.

The previous prime is 12020202209. The next prime is 12020202263. The reversal of 12020202221 is 12220202021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7989856996 + 4030345225 = 89386^2 + 63485^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020202221 - 2²² = 12016007917 is a prime.

It is a super-2 number, since 2×12020202221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12020202196 and 12020202205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12022202221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010101110 + 6010101111.

It is an arithmetic number, because the mean of its divisors is an integer number (6010101111).

Almost surely, 2^12020202221 is an apocalyptic number.

It is an amenable number.

12020202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020202221 is an equidigital number, since it uses as much as digits as its factorization.

12020202221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12020202221 its reverse (12220202021), we get a palindrome (24240404242).

The spelling of 12020202221 in words is "twelve billion, twenty million, two hundred two thousand, two hundred twenty-one".