21033216007 has 2 divisors, whose sum is σ = 21033216008. Its totient is φ = 21033216006.

The previous prime is 21033215977. The next prime is 21033216041. The reversal of 21033216007 is 70061233012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21033216007 - 2²³ = 21024827399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21033216067) 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, 10516608003 + 10516608004.

It is an arithmetic number, because the mean of its divisors is an integer number (10516608004).

Almost surely, 2^21033216007 is an apocalyptic number.

21033216007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033216007 is an equidigital number, since it uses as much as digits as its factorization.

21033216007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 21033216007 its reverse (70061233012), we get a palindrome (91094449019).

The spelling of 21033216007 in words is "twenty-one billion, thirty-three million, two hundred sixteen thousand, seven".