21211030133 has 16 divisors (see below), whose sum is σ = 22431408000. Its totient is φ = 20001219840.

The previous prime is 21211030129. The next prime is 21211030147. The reversal of 21211030133 is 33103011212.

It is a cyclic number.

It is not a de Polignac number, because 21211030133 - 2² = 21211030129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211030193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6955193 + ... + 6958241.

It is an arithmetic number, because the mean of its divisors is an integer number (1401963000).

Almost surely, 2^21211030133 is an apocalyptic number.

It is an amenable number.

21211030133 is a deficient number, since it is larger than the sum of its proper divisors (1220377867).

21211030133 is a wasteful number, since it uses less digits than its factorization.

21211030133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21211030133 its reverse (33103011212), we get a palindrome (54314041345).

The spelling of 21211030133 in words is "twenty-one billion, two hundred eleven million, thirty thousand, one hundred thirty-three".