21202213233 has 8 divisors (see below), whose sum is σ = 28272311488. Its totient is φ = 14133461904.

The previous prime is 21202213157. The next prime is 21202213243. The reversal of 21202213233 is 33231220212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21202213233 - 2¹³ = 21202205041 is a prime.

It is a super-3 number, since 3×21202213233³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202213243) 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 7 ways as a sum of consecutive naturals, for example, 299410 + ... + 363387.

It is an arithmetic number, because the mean of its divisors is an integer number (3534038936).

Almost surely, 2^21202213233 is an apocalyptic number.

It is an amenable number.

21202213233 is a deficient number, since it is larger than the sum of its proper divisors (7070098255).

21202213233 is a wasteful number, since it uses less digits than its factorization.

21202213233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673463.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21202213233 its reverse (33231220212), we get a palindrome (54433433445).

The spelling of 21202213233 in words is "twenty-one billion, two hundred two million, two hundred thirteen thousand, two hundred thirty-three".