211020100221 has 8 divisors (see below), whose sum is σ = 321554438464. Its totient is φ = 120582914400.

The previous prime is 211020100219. The next prime is 211020100237. The reversal of 211020100221 is 122001020112.

211020100221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 211020100221 - 2¹ = 211020100219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211020100197 and 211020100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020300221) 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, 5024288080 + ... + 5024288121.

It is an arithmetic number, because the mean of its divisors is an integer number (40194304808).

Almost surely, 2^211020100221 is an apocalyptic number.

211020100221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211020100221 is a deficient number, since it is larger than the sum of its proper divisors (110534338243).

211020100221 is a wasteful number, since it uses less digits than its factorization.

211020100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10048576211.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211020100221 its reverse (122001020112), we get a palindrome (333021120333).

The spelling of 211020100221 in words is "two hundred eleven billion, twenty million, one hundred thousand, two hundred twenty-one".