21001222333 has 16 divisors (see below), whose sum is σ = 25867373056. Its totient is φ = 16603678080.

The previous prime is 21001222327. The next prime is 21001222373. The reversal of 21001222333 is 33322210012.

It is a cyclic number.

It is not a de Polignac number, because 21001222333 - 2⁵ = 21001222301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21001222333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001222373) 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, 32860 + ... + 207562.

It is an arithmetic number, because the mean of its divisors is an integer number (1616710816).

Almost surely, 2^21001222333 is an apocalyptic number.

It is an amenable number.

21001222333 is a deficient number, since it is larger than the sum of its proper divisors (4866150723).

21001222333 is a wasteful number, since it uses less digits than its factorization.

21001222333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176044.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21001222333 its reverse (33322210012), we get a palindrome (54323432345).

The spelling of 21001222333 in words is "twenty-one billion, one million, two hundred twenty-two thousand, three hundred thirty-three".