21202002212109 has 8 divisors (see below), whose sum is σ = 28269359412000. Its totient is φ = 14134656576816.

The previous prime is 21202002212101. The next prime is 21202002212129. The reversal of 21202002212109 is 90121220020212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21202002212109 - 2³ = 21202002212101 is a prime.

It is a super-4 number, since 4×21202002212109⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202002212101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3250474 + ... + 7278020.

It is an arithmetic number, because the mean of its divisors is an integer number (3533669926500).

Almost surely, 2^{21202002212109} is an apocalyptic number.

It is an amenable number.

21202002212109 is a deficient number, since it is larger than the sum of its proper divisors (7067357199891).

21202002212109 is a wasteful number, since it uses less digits than its factorization.

21202002212109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5782299.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 21202002212109 in words is "twenty-one trillion, two hundred two billion, two million, two hundred twelve thousand, one hundred nine".