353220121 has 2 divisors, whose sum is σ = 353220122. Its totient is φ = 353220120.

The previous prime is 353220097. The next prime is 353220191. The reversal of 353220121 is 121022353.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353026521 + 193600 = 18789^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 353220121 - 2⁹ = 353219609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (353220191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176610060 + 176610061.

It is an arithmetic number, because the mean of its divisors is an integer number (176610061).

Almost surely, 2^353220121 is an apocalyptic number.

It is an amenable number.

353220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

353220121 is an equidigital number, since it uses as much as digits as its factorization.

353220121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 353220121 is about 18794.1512444696. The cubic root of 353220121 is about 706.8845316101.

Adding to 353220121 its reverse (121022353), we get a palindrome (474242474).

It can be divided in two parts, 3532 and 20121, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 353220121 in words is "three hundred fifty-three million, two hundred twenty thousand, one hundred twenty-one".