203020413221 has 2 divisors, whose sum is σ = 203020413222. Its totient is φ = 203020413220.

The previous prime is 203020413209. The next prime is 203020413251. The reversal of 203020413221 is 122314020302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153224490721 + 49795922500 = 391439^2 + 223150^2 .

It is a cyclic number.

It is not a de Polignac number, because 203020413221 - 2¹⁴ = 203020396837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203020413193 and 203020413202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203020413251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510206610 + 101510206611.

It is an arithmetic number, because the mean of its divisors is an integer number (101510206611).

Almost surely, 2^203020413221 is an apocalyptic number.

It is an amenable number.

203020413221 is a deficient number, since it is larger than the sum of its proper divisors (1).

203020413221 is an equidigital number, since it uses as much as digits as its factorization.

203020413221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 203020413221 its reverse (122314020302), we get a palindrome (325334433523).

The spelling of 203020413221 in words is "two hundred three billion, twenty million, four hundred thirteen thousand, two hundred twenty-one".