21033133001 has 2 divisors, whose sum is σ = 21033133002. Its totient is φ = 21033133000.

The previous prime is 21033132973. The next prime is 21033133039. The reversal of 21033133001 is 10033133012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20938090000 + 95043001 = 144700^2 + 9749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033133001 is a prime.

It is not a weakly prime, because it can be changed into another prime (21033183001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516566500 + 10516566501.

It is an arithmetic number, because the mean of its divisors is an integer number (10516566501).

Almost surely, 2^21033133001 is an apocalyptic number.

It is an amenable number.

21033133001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033133001 is an equidigital number, since it uses as much as digits as its factorization.

21033133001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21033133001 its reverse (10033133012), we get a palindrome (31066266013).

The spelling of 21033133001 in words is "twenty-one billion, thirty-three million, one hundred thirty-three thousand, one".