21114133109 has 2 divisors, whose sum is σ = 21114133110. Its totient is φ = 21114133108.

The previous prime is 21114133091. The next prime is 21114133141. The reversal of 21114133109 is 90133141112.

Together with previous prime (21114133091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20964144100 + 149989009 = 144790^2 + 12247^2 .

It is a cyclic number.

It is not a de Polignac number, because 21114133109 - 2²⁴ = 21097355893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21114133409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557066554 + 10557066555.

It is an arithmetic number, because the mean of its divisors is an integer number (10557066555).

Almost surely, 2^21114133109 is an apocalyptic number.

It is an amenable number.

21114133109 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114133109 is an equidigital number, since it uses as much as digits as its factorization.

21114133109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 21114133109 in words is "twenty-one billion, one hundred fourteen million, one hundred thirty-three thousand, one hundred nine".