21221102002009 has 16 divisors (see below), whose sum is σ = 27253856754432. Its totient is φ = 16060308441408.

The previous prime is 21221102002007. The next prime is 21221102002013. The reversal of 21221102002009 is 90020020112212.

It is not a de Polignac number, because 21221102002009 - 2¹ = 21221102002007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221102002007) 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, 5069539714 + ... + 5069543899.

It is an arithmetic number, because the mean of its divisors is an integer number (1703366047152).

Almost surely, 2^{21221102002009} is an apocalyptic number.

It is an amenable number.

21221102002009 is a deficient number, since it is larger than the sum of its proper divisors (6032754752423).

21221102002009 is a wasteful number, since it uses less digits than its factorization.

21221102002009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10139083656.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 21221102002009 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred two million, two thousand, nine".