21213442232 has 32 divisors (see below), whose sum is σ = 41163120000. Its totient is φ = 10236901248.

The previous prime is 21213442219. The next prime is 21213442241. The reversal of 21213442232 is 23224431212.

It is a super-3 number, since 3×21213442232³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

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, 613994 + ... + 647622.

It is an arithmetic number, because the mean of its divisors is an integer number (1286347500).

Almost surely, 2^21213442232 is an apocalyptic number.

It is an amenable number.

21213442232 is a deficient number, since it is larger than the sum of its proper divisors (19949677768).

21213442232 is a wasteful number, since it uses less digits than its factorization.

21213442232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36383 (or 36379 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

Adding to 21213442232 its reverse (23224431212), we get a palindrome (44437873444).

The spelling of 21213442232 in words is "twenty-one billion, two hundred thirteen million, four hundred forty-two thousand, two hundred thirty-two".