203021221157 has 2 divisors, whose sum is σ = 203021221158. Its totient is φ = 203021221156.

The previous prime is 203021221111. The next prime is 203021221159. The reversal of 203021221157 is 751122120302.

203021221157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198230643361 + 4790577796 = 445231^2 + 69214^2 .

It is a cyclic number.

It is not a de Polignac number, because 203021221157 - 2⁸ = 203021220901 is a prime.

Together with 203021221159, 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 (203021221159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510610578 + 101510610579.

It is an arithmetic number, because the mean of its divisors is an integer number (101510610579).

Almost surely, 2^203021221157 is an apocalyptic number.

It is an amenable number.

203021221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

203021221157 is an equidigital number, since it uses as much as digits as its factorization.

203021221157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 203021221157 its reverse (751122120302), we get a palindrome (954143341459).

The spelling of 203021221157 in words is "two hundred three billion, twenty-one million, two hundred twenty-one thousand, one hundred fifty-seven".