211020020221 has 8 divisors (see below), whose sum is σ = 211509345600. Its totient is φ = 210531152832.

The previous prime is 211020020203. The next prime is 211020020249. The reversal of 211020020221 is 122020020112.

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 211020020221 - 2¹¹ = 211020018173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020020021) 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, 816826 + ... + 1043668.

It is an arithmetic number, because the mean of its divisors is an integer number (26438668200).

Almost surely, 2^211020020221 is an apocalyptic number.

It is an amenable number.

211020020221 is a deficient number, since it is larger than the sum of its proper divisors (489325379).

211020020221 is a wasteful number, since it uses less digits than its factorization.

211020020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228995.

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

Adding to 211020020221 its reverse (122020020112), we get a palindrome (333040040333).

The spelling of 211020020221 in words is "two hundred eleven billion, twenty million, twenty thousand, two hundred twenty-one".