20011102210221 has 16 divisors (see below), whose sum is σ = 27612681735360. Its totient is φ = 12875500794240.

The previous prime is 20011102210171. The next prime is 20011102210223. The reversal of 20011102210221 is 12201220111002.

It is not a de Polignac number, because 20011102210221 - 2¹⁵ = 20011102177453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011102210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011102210223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46289635 + ... + 46719936.

It is an arithmetic number, because the mean of its divisors is an integer number (1725792608460).

Almost surely, 2^{20011102210221} is an apocalyptic number.

It is an amenable number.

20011102210221 is a deficient number, since it is larger than the sum of its proper divisors (7601579525139).

20011102210221 is a wasteful number, since it uses less digits than its factorization.

20011102210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93012076.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20011102210221 its reverse (12201220111002), we get a palindrome (32212322321223).

The spelling of 20011102210221 in words is "twenty trillion, eleven billion, one hundred two million, two hundred ten thousand, two hundred twenty-one".