220202121173 has 2 divisors, whose sum is σ = 220202121174. Its totient is φ = 220202121172.

The previous prime is 220202121151. The next prime is 220202121221. The reversal of 220202121173 is 371121202022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210734247364 + 9467873809 = 459058^2 + 97303^2 .

It is a cyclic number.

It is not a de Polignac number, because 220202121173 - 2²⁶ = 220135012309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220202151173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110101060586 + 110101060587.

It is an arithmetic number, because the mean of its divisors is an integer number (110101060587).

Almost surely, 2^220202121173 is an apocalyptic number.

It is an amenable number.

220202121173 is a deficient number, since it is larger than the sum of its proper divisors (1).

220202121173 is an equidigital number, since it uses as much as digits as its factorization.

220202121173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 220202121173 its reverse (371121202022), we get a palindrome (591323323195).

The spelling of 220202121173 in words is "two hundred twenty billion, two hundred two million, one hundred twenty-one thousand, one hundred seventy-three".