21301332201209 has 4 divisors (see below), whose sum is σ = 21570969317760. Its totient is φ = 21031695084660.

The previous prime is 21301332201169. The next prime is 21301332201211. The reversal of 21301332201209 is 90210223310312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21301332201209 - 2¹² = 21301332197113 is a prime.

It is a super-2 number, since 2×21301332201209² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301332201239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134818558157 + ... + 134818558314.

It is an arithmetic number, because the mean of its divisors is an integer number (5392742329440).

Almost surely, 2^{21301332201209} is an apocalyptic number.

It is an amenable number.

21301332201209 is a deficient number, since it is larger than the sum of its proper divisors (269637116551).

21301332201209 is an equidigital number, since it uses as much as digits as its factorization.

21301332201209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269637116550.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 21301332201209 in words is "twenty-one trillion, three hundred one billion, three hundred thirty-two million, two hundred one thousand, two hundred nine".