21030133109 has 16 divisors (see below), whose sum is σ = 22859707200. Its totient is φ = 19281338496.

The previous prime is 21030133093. The next prime is 21030133129. The reversal of 21030133109 is 90133103012.

It is a cyclic number.

It is not a de Polignac number, because 21030133109 - 2⁴ = 21030133093 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 (21030133129) 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, 29024 + ... + 207129.

It is an arithmetic number, because the mean of its divisors is an integer number (1428731700).

Almost surely, 2^21030133109 is an apocalyptic number.

It is an amenable number.

21030133109 is a deficient number, since it is larger than the sum of its proper divisors (1829574091).

21030133109 is a wasteful number, since it uses less digits than its factorization.

21030133109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236324.

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 21030133109 in words is "twenty-one billion, thirty million, one hundred thirty-three thousand, one hundred nine".