203021081 has 2 divisors, whose sum is σ = 203021082. Its totient is φ = 203021080.

The previous prime is 203021033. The next prime is 203021101. The reversal of 203021081 is 180120302.

203021081 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., 151683856 + 51337225 = 12316^2 + 7165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203021081 is a prime.

It is a super-2 number, since 2×203021081² = 82435118660817122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (203021281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510540 + 101510541.

It is an arithmetic number, because the mean of its divisors is an integer number (101510541).

Almost surely, 2^203021081 is an apocalyptic number.

It is an amenable number.

203021081 is a deficient number, since it is larger than the sum of its proper divisors (1).

203021081 is an equidigital number, since it uses as much as digits as its factorization.

203021081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 203021081 is about 14248.5466276389. The cubic root of 203021081 is about 587.7334093534.

Adding to 203021081 its reverse (180120302), we get a palindrome (383141383).

The spelling of 203021081 in words is "two hundred three million, twenty-one thousand, eighty-one".