203402414021 has 2 divisors, whose sum is σ = 203402414022. Its totient is φ = 203402414020.

The previous prime is 203402413939. The next prime is 203402414023. The reversal of 203402414021 is 120414204302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147675729796 + 55726684225 = 384286^2 + 236065^2 .

It is a cyclic number.

It is not a de Polignac number, because 203402414021 - 2³⁰ = 202328672197 is a prime.

Together with 203402414023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203402414023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101701207010 + 101701207011.

It is an arithmetic number, because the mean of its divisors is an integer number (101701207011).

Almost surely, 2^203402414021 is an apocalyptic number.

It is an amenable number.

203402414021 is a deficient number, since it is larger than the sum of its proper divisors (1).

203402414021 is an equidigital number, since it uses as much as digits as its factorization.

203402414021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 203402414021 its reverse (120414204302), we get a palindrome (323816618323).

The spelling of 203402414021 in words is "two hundred three billion, four hundred two million, four hundred fourteen thousand, twenty-one".