20010220100221 has 8 divisors (see below), whose sum is σ = 22683650316320. Its totient is φ = 17498815957872.

The previous prime is 20010220100209. The next prime is 20010220100231. The reversal of 20010220100221 is 12200102201002.

It is a happy number.

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 20010220100221 - 2⁷ = 20010220100093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010220100231) 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, 40506518175 + ... + 40506518668.

It is an arithmetic number, because the mean of its divisors is an integer number (2835456289540).

Almost surely, 2^{20010220100221} is an apocalyptic number.

It is an amenable number.

20010220100221 is a deficient number, since it is larger than the sum of its proper divisors (2673430216099).

20010220100221 is a wasteful number, since it uses less digits than its factorization.

20010220100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81013036875.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20010220100221 its reverse (12200102201002), we get a palindrome (32210322301223).

The spelling of 20010220100221 in words is "twenty trillion, ten billion, two hundred twenty million, one hundred thousand, two hundred twenty-one".