21213044033 has 8 divisors (see below), whose sum is σ = 22652417280. Its totient is φ = 19820863440.

The previous prime is 21213044029. The next prime is 21213044051. The reversal of 21213044033 is 33044031212.

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

It is a cyclic number.

It is not a de Polignac number, because 21213044033 - 2² = 21213044029 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213044093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11797235 + ... + 11799032.

It is an arithmetic number, because the mean of its divisors is an integer number (2831552160).

Almost surely, 2^21213044033 is an apocalyptic number.

It is an amenable number.

21213044033 is a deficient number, since it is larger than the sum of its proper divisors (1439373247).

21213044033 is a wasteful number, since it uses less digits than its factorization.

21213044033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23596327.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21213044033 its reverse (33044031212), we get a palindrome (54257075245).

The spelling of 21213044033 in words is "twenty-one billion, two hundred thirteen million, forty-four thousand, thirty-three".