21010201100221 has 8 divisors (see below), whose sum is σ = 21193687962560. Its totient is φ = 20827483575552.

The previous prime is 21010201100209. The next prime is 21010201100249. The reversal of 21010201100221 is 12200110201012.

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 21010201100221 - 2¹³ = 21010201092029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010201107221) 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, 192279561 + ... + 192388798.

It is an arithmetic number, because the mean of its divisors is an integer number (2649210995320).

Almost surely, 2^{21010201100221} is an apocalyptic number.

It is an amenable number.

21010201100221 is a deficient number, since it is larger than the sum of its proper divisors (183486862339).

21010201100221 is a wasteful number, since it uses less digits than its factorization.

21010201100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384668835.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010201100221 its reverse (12200110201012), we get a palindrome (33210311301233).

The spelling of 21010201100221 in words is "twenty-one trillion, ten billion, two hundred one million, one hundred thousand, two hundred twenty-one".