12020220221221 has 2 divisors, whose sum is σ = 12020220221222. Its totient is φ = 12020220221220.

The previous prime is 12020220221213. The next prime is 12020220221323. The reversal of 12020220221221 is 12212202202021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11518794784225 + 501425436996 = 3393935^2 + 708114^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020220221221 - 2³ = 12020220221213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12020220201221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010110110610 + 6010110110611.

It is an arithmetic number, because the mean of its divisors is an integer number (6010110110611).

Almost surely, 2^{12020220221221} is an apocalyptic number.

It is an amenable number.

12020220221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020220221221 is an equidigital number, since it uses as much as digits as its factorization.

12020220221221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12020220221221 its reverse (12212202202021), we get a palindrome (24232422423242).

The spelling of 12020220221221 in words is "twelve trillion, twenty billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".