203020321171 has 2 divisors, whose sum is σ = 203020321172. Its totient is φ = 203020321170.

The previous prime is 203020321087. The next prime is 203020321177. The reversal of 203020321171 is 171123020302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203020321171 is a prime.

It is a super-2 number, since 2×203020321171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203020321177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510160585 + 101510160586.

It is an arithmetic number, because the mean of its divisors is an integer number (101510160586).

Almost surely, 2^203020321171 is an apocalyptic number.

203020321171 is a deficient number, since it is larger than the sum of its proper divisors (1).

203020321171 is an equidigital number, since it uses as much as digits as its factorization.

203020321171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 203020321171 its reverse (171123020302), we get a palindrome (374143341473).

The spelling of 203020321171 in words is "two hundred three billion, twenty million, three hundred twenty-one thousand, one hundred seventy-one".