220010001221209 has 2 divisors, whose sum is σ = 220010001221210. Its totient is φ = 220010001221208.

The previous prime is 220010001221173. The next prime is 220010001221233. The reversal of 220010001221209 is 902122100010022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155525841000000 + 64484160221209 = 12471000^2 + 8030203^2 .

It is a cyclic number.

It is not a de Polignac number, because 220010001221209 - 2¹³ = 220010001213017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220010001221209.

It is not a weakly prime, because it can be changed into another prime (220010001221009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110005000610604 + 110005000610605.

It is an arithmetic number, because the mean of its divisors is an integer number (110005000610605).

Almost surely, 2^{220010001221209} is an apocalyptic number.

It is an amenable number.

220010001221209 is a deficient number, since it is larger than the sum of its proper divisors (1).

220010001221209 is an equidigital number, since it uses as much as digits as its factorization.

220010001221209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 220010001221209 in words is "two hundred twenty trillion, ten billion, one million, two hundred twenty-one thousand, two hundred nine".