355020121 has 2 divisors, whose sum is σ = 355020122. Its totient is φ = 355020120.

The previous prime is 355020109. The next prime is 355020167. The reversal of 355020121 is 121020553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353853721 + 1166400 = 18811^2 + 1080^2 .

It is an emirp because it is prime and its reverse (121020553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 355020121 - 2¹¹ = 355018073 is a prime.

It is not a weakly prime, because it can be changed into another prime (355020191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177510060 + 177510061.

It is an arithmetic number, because the mean of its divisors is an integer number (177510061).

Almost surely, 2^355020121 is an apocalyptic number.

It is an amenable number.

355020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

355020121 is an equidigital number, since it uses as much as digits as its factorization.

355020121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 355020121 is about 18841.9776297500. The cubic root of 355020121 is about 708.0832523900.

Adding to 355020121 its reverse (121020553), we get a palindrome (476040674).

The spelling of 355020121 in words is "three hundred fifty-five million, twenty thousand, one hundred twenty-one".