21213033234 has 8 divisors (see below), whose sum is σ = 42426066480. Its totient is φ = 7071011076.

The previous prime is 21213033209. The next prime is 21213033241. The reversal of 21213033234 is 43233031212.

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

21213033234 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767752764 + ... + 1767752775.

It is an arithmetic number, because the mean of its divisors is an integer number (5303258310).

Almost surely, 2^21213033234 is an apocalyptic number.

21213033234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21213033234 is a wasteful number, since it uses less digits than its factorization.

21213033234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535505544.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21213033234 its reverse (43233031212), we get a palindrome (64446064446).

The spelling of 21213033234 in words is "twenty-one billion, two hundred thirteen million, thirty-three thousand, two hundred thirty-four".