203020321087 has 2 divisors, whose sum is σ = 203020321088. Its totient is φ = 203020321086.

The previous prime is 203020321073. The next prime is 203020321171. The reversal of 203020321087 is 780123020302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203020321087 - 2²³ = 203011932479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203020321037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510160543 + 101510160544.

It is an arithmetic number, because the mean of its divisors is an integer number (101510160544).

Almost surely, 2^203020321087 is an apocalyptic number.

203020321087 is a deficient number, since it is larger than the sum of its proper divisors (1).

203020321087 is an equidigital number, since it uses as much as digits as its factorization.

203020321087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 203020321087 its reverse (780123020302), we get a palindrome (983143341389).

The spelling of 203020321087 in words is "two hundred three billion, twenty million, three hundred twenty-one thousand, eighty-seven".