20010020221 has 8 divisors (see below), whose sum is σ = 22302190080. Its totient is φ = 17841751488.

The previous prime is 20010020179. The next prime is 20010020227. The reversal of 20010020221 is 12202001002.

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

It is not a de Polignac number, because 20010020221 - 2¹⁵ = 20009987453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010020198 and 20010020207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010020227) 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, 30974941 + ... + 30975586.

It is an arithmetic number, because the mean of its divisors is an integer number (2787773760).

Almost surely, 2^20010020221 is an apocalyptic number.

It is an amenable number.

20010020221 is a deficient number, since it is larger than the sum of its proper divisors (2292169859).

20010020221 is a wasteful number, since it uses less digits than its factorization.

20010020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61950563.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20010020221 its reverse (12202001002), we get a palindrome (32212021223).

The spelling of 20010020221 in words is "twenty billion, ten million, twenty thousand, two hundred twenty-one".