355004040104221 has 2 divisors, whose sum is σ = 355004040104222. Its totient is φ = 355004040104220.

The previous prime is 355004040104123. The next prime is 355004040104227. The reversal of 355004040104221 is 122401040400553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205607322492196 + 149396717612025 = 14339014^2 + 12222795^2 .

It is an emirp because it is prime and its reverse (122401040400553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 355004040104221 - 2¹⁹ = 355004039579933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355004040104227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177502020052110 + 177502020052111.

It is an arithmetic number, because the mean of its divisors is an integer number (177502020052111).

Almost surely, 2^{355004040104221} is an apocalyptic number.

It is an amenable number.

355004040104221 is a deficient number, since it is larger than the sum of its proper divisors (1).

355004040104221 is an equidigital number, since it uses as much as digits as its factorization.

355004040104221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 355004040104221 its reverse (122401040400553), we get a palindrome (477405080504774).

The spelling of 355004040104221 in words is "three hundred fifty-five trillion, four billion, forty million, one hundred four thousand, two hundred twenty-one".