21352525201209 has 8 divisors (see below), whose sum is σ = 28529469999360. Its totient is φ = 14205298601936.

The previous prime is 21352525201193. The next prime is 21352525201223. The reversal of 21352525201209 is 90210252525312.

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

It is a cyclic number.

It is not a de Polignac number, because 21352525201209 - 2⁴ = 21352525201193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21352525201409) 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, 7429548042 + ... + 7429550915.

It is an arithmetic number, because the mean of its divisors is an integer number (3566183749920).

Almost surely, 2^{21352525201209} is an apocalyptic number.

It is an amenable number.

21352525201209 is a deficient number, since it is larger than the sum of its proper divisors (7176944798151).

21352525201209 is a wasteful number, since it uses less digits than its factorization.

21352525201209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14859099439.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 21352525201209 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred one thousand, two hundred nine".