220220021201221 has 2 divisors, whose sum is σ = 220220021201222. Its totient is φ = 220220021201220.

The previous prime is 220220021201209. The next prime is 220220021201237. The reversal of 220220021201221 is 122102120022022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215680505184225 + 4539516016996 = 14686065^2 + 2130614^2 .

It is a cyclic number.

It is not a de Polignac number, because 220220021201221 - 2⁷ = 220220021201093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220220021201251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110010600610 + 110110010600611.

It is an arithmetic number, because the mean of its divisors is an integer number (110110010600611).

Almost surely, 2^{220220021201221} is an apocalyptic number.

It is an amenable number.

220220021201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220220021201221 is an equidigital number, since it uses as much as digits as its factorization.

220220021201221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 220220021201221 its reverse (122102120022022), we get a palindrome (342322141223243).

The spelling of 220220021201221 in words is "two hundred twenty trillion, two hundred twenty billion, twenty-one million, two hundred one thousand, two hundred twenty-one".