220021212193 has 2 divisors, whose sum is σ = 220021212194. Its totient is φ = 220021212192.

The previous prime is 220021212083. The next prime is 220021212247. The reversal of 220021212193 is 391212120022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140379856929 + 79641355264 = 374673^2 + 282208^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021212193 - 2¹⁷ = 220021081121 is a prime.

It is not a weakly prime, because it can be changed into another prime (220021212293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010606096 + 110010606097.

It is an arithmetic number, because the mean of its divisors is an integer number (110010606097).

Almost surely, 2^220021212193 is an apocalyptic number.

It is an amenable number.

220021212193 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021212193 is an equidigital number, since it uses as much as digits as its factorization.

220021212193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 220021212193 in words is "two hundred twenty billion, twenty-one million, two hundred twelve thousand, one hundred ninety-three".