20010220012221 has 8 divisors (see below), whose sum is σ = 26682308378304. Its totient is φ = 13339139160480.

The previous prime is 20010220012171. The next prime is 20010220012249. The reversal of 20010220012221 is 12221002201002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20010220012221 - 2¹¹ = 20010220010173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20010220012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010220012121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251832241 + ... + 251911686.

It is an arithmetic number, because the mean of its divisors is an integer number (3335288547288).

Almost surely, 2^{20010220012221} is an apocalyptic number.

It is an amenable number.

20010220012221 is a deficient number, since it is larger than the sum of its proper divisors (6672088366083).

20010220012221 is a wasteful number, since it uses less digits than its factorization.

20010220012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503757171.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20010220012221 its reverse (12221002201002), we get a palindrome (32231222213223).

The spelling of 20010220012221 in words is "twenty trillion, ten billion, two hundred twenty million, twelve thousand, two hundred twenty-one".