21321220003211 has 8 divisors (see below), whose sum is σ = 22498209678240. Its totient is φ = 20165062004032.

The previous prime is 21321220003147. The next prime is 21321220003219. The reversal of 21321220003211 is 11230002212312.

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 21321220003211 - 2⁶ = 21321220003147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21321220003219) 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, 5207916860 + ... + 5207920953.

It is an arithmetic number, because the mean of its divisors is an integer number (2812276209780).

Almost surely, 2^{21321220003211} is an apocalyptic number.

21321220003211 is a deficient number, since it is larger than the sum of its proper divisors (1176989675029).

21321220003211 is a wasteful number, since it uses less digits than its factorization.

21321220003211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10415837925.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21321220003211 its reverse (11230002212312), we get a palindrome (32551222215523).

The spelling of 21321220003211 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred twenty million, three thousand, two hundred eleven".