20011010221 has 8 divisors (see below), whose sum is σ = 20184136704. Its totient is φ = 19838622720.

The previous prime is 20011010219. The next prime is 20011010249. The reversal of 20011010221 is 12201011002.

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 20011010221 - 2¹ = 20011010219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011010198 and 20011010207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011010281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130285 + ... + 238738.

It is an arithmetic number, because the mean of its divisors is an integer number (2523017088).

Almost surely, 2^20011010221 is an apocalyptic number.

It is an amenable number.

20011010221 is a deficient number, since it is larger than the sum of its proper divisors (173126483).

20011010221 is a wasteful number, since it uses less digits than its factorization.

20011010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369491.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20011010221 its reverse (12201011002), we get a palindrome (32212021223).

The spelling of 20011010221 in words is "twenty billion, eleven million, ten thousand, two hundred twenty-one".