203420422129 has 2 divisors, whose sum is σ = 203420422130. Its totient is φ = 203420422128.

The previous prime is 203420422013. The next prime is 203420422157. The reversal of 203420422129 is 921224024302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109576226529 + 93844195600 = 331023^2 + 306340^2 .

It is a cyclic number.

It is not a de Polignac number, because 203420422129 - 2⁷ = 203420422001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203420422129.

It is not a weakly prime, because it can be changed into another prime (203420422729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101710211064 + 101710211065.

It is an arithmetic number, because the mean of its divisors is an integer number (101710211065).

Almost surely, 2^203420422129 is an apocalyptic number.

It is an amenable number.

203420422129 is a deficient number, since it is larger than the sum of its proper divisors (1).

203420422129 is an equidigital number, since it uses as much as digits as its factorization.

203420422129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 203420422129 in words is "two hundred three billion, four hundred twenty million, four hundred twenty-two thousand, one hundred twenty-nine".