203112020420401 has 2 divisors, whose sum is σ = 203112020420402. Its totient is φ = 203112020420400.

The previous prime is 203112020420381. The next prime is 203112020420431. The reversal of 203112020420401 is 104024020211302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125065662092176 + 78046358328225 = 11183276^2 + 8834385^2 .

It is a cyclic number.

It is not a de Polignac number, because 203112020420401 - 2³⁷ = 202974581466929 is a prime.

It is not a weakly prime, because it can be changed into another prime (203112020420431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101556010210200 + 101556010210201.

It is an arithmetic number, because the mean of its divisors is an integer number (101556010210201).

Almost surely, 2^{203112020420401} is an apocalyptic number.

It is an amenable number.

203112020420401 is a deficient number, since it is larger than the sum of its proper divisors (1).

203112020420401 is an equidigital number, since it uses as much as digits as its factorization.

203112020420401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 203112020420401 its reverse (104024020211302), we get a palindrome (307136040631703).

The spelling of 203112020420401 in words is "two hundred three trillion, one hundred twelve billion, twenty million, four hundred twenty thousand, four hundred one".