203110011030221 has 2 divisors, whose sum is σ = 203110011030222. Its totient is φ = 203110011030220.

The previous prime is 203110011030211. The next prime is 203110011030247. The reversal of 203110011030221 is 122030110011302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103443931806121 + 99666079224100 = 10170739^2 + 9983290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203110011030221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203110011030221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203110011030211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101555005515110 + 101555005515111.

It is an arithmetic number, because the mean of its divisors is an integer number (101555005515111).

Almost surely, 2^{203110011030221} is an apocalyptic number.

It is an amenable number.

203110011030221 is a deficient number, since it is larger than the sum of its proper divisors (1).

203110011030221 is an equidigital number, since it uses as much as digits as its factorization.

203110011030221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 203110011030221 its reverse (122030110011302), we get a palindrome (325140121041523).

The spelling of 203110011030221 in words is "two hundred three trillion, one hundred ten billion, eleven million, thirty thousand, two hundred twenty-one".