211101020221 has 48 divisors (see below), whose sum is σ = 271899040000. Its totient is φ = 159589647360.

The previous prime is 211101020219. The next prime is 211101020231. The reversal of 211101020221 is 122020101112.

211101020221 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 211101020221 - 2¹ = 211101020219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211101020231) 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 47 ways as a sum of consecutive naturals, for example, 60123856 + ... + 60127366.

Almost surely, 2^211101020221 is an apocalyptic number.

It is an amenable number.

211101020221 is a deficient number, since it is larger than the sum of its proper divisors (60798019779).

211101020221 is a wasteful number, since it uses less digits than its factorization.

211101020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4826 (or 4803 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211101020221 its reverse (122020101112), we get a palindrome (333121121333).

The spelling of 211101020221 in words is "two hundred eleven billion, one hundred one million, twenty thousand, two hundred twenty-one".