211010020221 has 128 divisors (see below), whose sum is σ = 382890074112. Its totient is φ = 99815040000.

The previous prime is 211010020217. The next prime is 211010020297. The reversal of 211010020221 is 122020010112.

211010020221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211010020221 - 2² = 211010020217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211010020197 and 211010020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211010020421) 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 127 ways as a sum of consecutive naturals, for example, 94326115 + ... + 94328351.

It is an arithmetic number, because the mean of its divisors is an integer number (2991328704).

Almost surely, 2^211010020221 is an apocalyptic number.

211010020221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211010020221 is a deficient number, since it is larger than the sum of its proper divisors (171880053891).

211010020221 is a wasteful number, since it uses less digits than its factorization.

211010020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683.

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

Adding to 211010020221 its reverse (122020010112), we get a palindrome (333030030333).

The spelling of 211010020221 in words is "two hundred eleven billion, ten million, twenty thousand, two hundred twenty-one".