21133330231 has 16 divisors (see below), whose sum is σ = 22904541184. Its totient is φ = 19383253344.

The previous prime is 21133330201. The next prime is 21133330289. The reversal of 21133330231 is 13203333112.

It is not a de Polignac number, because 21133330231 - 2⁷ = 21133330103 is a prime.

It is a super-2 number, since 2×21133330231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133330201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1579090 + ... + 1592416.

It is an arithmetic number, because the mean of its divisors is an integer number (1431533824).

Almost surely, 2^21133330231 is an apocalyptic number.

21133330231 is a deficient number, since it is larger than the sum of its proper divisors (1771210953).

21133330231 is a wasteful number, since it uses less digits than its factorization.

21133330231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14110.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21133330231 its reverse (13203333112), we get a palindrome (34336663343).

The spelling of 21133330231 in words is "twenty-one billion, one hundred thirty-three million, three hundred thirty thousand, two hundred thirty-one".