21030321333 has 16 divisors (see below), whose sum is σ = 32055203840. Its totient is φ = 12013951536.

The previous prime is 21030321269. The next prime is 21030321373. The reversal of 21030321333 is 33312303012.

It is not a de Polignac number, because 21030321333 - 2⁶ = 21030321269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030321373) 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 in 15 ways as a sum of consecutive naturals, for example, 63073 + ... + 214566.

It is an arithmetic number, because the mean of its divisors is an integer number (2003450240).

Almost surely, 2^21030321333 is an apocalyptic number.

It is an amenable number.

21030321333 is a deficient number, since it is larger than the sum of its proper divisors (11024882507).

21030321333 is a wasteful number, since it uses less digits than its factorization.

21030321333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281256.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21030321333 its reverse (33312303012), we get a palindrome (54342624345).

The spelling of 21030321333 in words is "twenty-one billion, thirty million, three hundred twenty-one thousand, three hundred thirty-three".