201043403021 has 2 divisors, whose sum is σ = 201043403022. Its totient is φ = 201043403020.

The previous prime is 201043403017. The next prime is 201043403047. The reversal of 201043403021 is 120304340102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152559766921 + 48483636100 = 390589^2 + 220190^2 .

It is a cyclic number.

It is not a de Polignac number, because 201043403021 - 2² = 201043403017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201043402984 and 201043403002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201043403081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100521701510 + 100521701511.

It is an arithmetic number, because the mean of its divisors is an integer number (100521701511).

Almost surely, 2^201043403021 is an apocalyptic number.

It is an amenable number.

201043403021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201043403021 is an equidigital number, since it uses as much as digits as its factorization.

201043403021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 201043403021 its reverse (120304340102), we get a palindrome (321347743123).

The spelling of 201043403021 in words is "two hundred one billion, forty-three million, four hundred three thousand, twenty-one".