21212241099 has 16 divisors (see below), whose sum is σ = 32732574720. Its totient is φ = 11967845760.

The previous prime is 21212241091. The next prime is 21212241143. The reversal of 21212241099 is 99014221212.

It is not a de Polignac number, because 21212241099 - 2³ = 21212241091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212241091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6391422 + ... + 6394739.

It is an arithmetic number, because the mean of its divisors is an integer number (2045785920).

Almost surely, 2^21212241099 is an apocalyptic number.

21212241099 is a deficient number, since it is larger than the sum of its proper divisors (11520333621).

21212241099 is a wasteful number, since it uses less digits than its factorization.

21212241099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12786250.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 21212241099 in words is "twenty-one billion, two hundred twelve million, two hundred forty-one thousand, ninety-nine".