21212000133 has 8 divisors (see below), whose sum is σ = 28472484000. Its totient is φ = 14046424848.

The previous prime is 21212000119. The next prime is 21212000167. The reversal of 21212000133 is 33100021212.

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

It is a de Polignac number, because none of the positive numbers 2^k-21212000133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212000533) 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, 23726623 + ... + 23727516.

It is an arithmetic number, because the mean of its divisors is an integer number (3559060500).

Almost surely, 2^21212000133 is an apocalyptic number.

It is an amenable number.

21212000133 is a deficient number, since it is larger than the sum of its proper divisors (7260483867).

21212000133 is a wasteful number, since it uses less digits than its factorization.

21212000133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47454291.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21212000133 its reverse (33100021212), we get a palindrome (54312021345).

The spelling of 21212000133 in words is "twenty-one billion, two hundred twelve million, one hundred thirty-three", and thus it is an aban number.