20113201200221 has 8 divisors (see below), whose sum is σ = 20321775948600. Its totient is φ = 19904651394048.

The previous prime is 20113201200199. The next prime is 20113201200263. The reversal of 20113201200221 is 12200210231102.

It can be written as a sum of positive squares in 4 ways, for example, as 2234468894596 + 17878732305625 = 1494814^2 + 4228325^2 .

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 20113201200221 - 2³⁸ = 19838323293277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20113201200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113201200271) 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, 4612226 + ... + 7842131.

It is an arithmetic number, because the mean of its divisors is an integer number (2540221993575).

Almost surely, 2^{20113201200221} is an apocalyptic number.

It is an amenable number.

20113201200221 is a deficient number, since it is larger than the sum of its proper divisors (208574748379).

20113201200221 is a wasteful number, since it uses less digits than its factorization.

20113201200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12471103.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20113201200221 its reverse (12200210231102), we get a palindrome (32313411431323).

The spelling of 20113201200221 in words is "twenty trillion, one hundred thirteen billion, two hundred one million, two hundred thousand, two hundred twenty-one".