21033330041 has 2 divisors, whose sum is σ = 21033330042. Its totient is φ = 21033330040.

The previous prime is 21033330013. The next prime is 21033330107. The reversal of 21033330041 is 14003333012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15177254416 + 5856075625 = 123196^2 + 76525^2 .

It is a cyclic number.

It is not a de Polignac number, because 21033330041 - 2²² = 21029135737 is a prime.

It is a super-2 number, since 2×21033330041² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21033329995 and 21033330022.

It is not a weakly prime, because it can be changed into another prime (21033338041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516665020 + 10516665021.

It is an arithmetic number, because the mean of its divisors is an integer number (10516665021).

Almost surely, 2^21033330041 is an apocalyptic number.

It is an amenable number.

21033330041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033330041 is an equidigital number, since it uses as much as digits as its factorization.

21033330041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21033330041 its reverse (14003333012), we get a palindrome (35036663053).

The spelling of 21033330041 in words is "twenty-one billion, thirty-three million, three hundred thirty thousand, forty-one".