210221211101 has 12 divisors (see below), whose sum is σ = 232599878112. Its totient is φ = 189844545000.

The previous prime is 210221211077. The next prime is 210221211119. The reversal of 210221211101 is 101112122012.

It is not a de Polignac number, because 210221211101 - 2⁶ = 210221211037 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 (210221211181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5734595 + ... + 5771136.

It is an arithmetic number, because the mean of its divisors is an integer number (19383323176).

Almost surely, 2^210221211101 is an apocalyptic number.

It is an amenable number.

210221211101 is a deficient number, since it is larger than the sum of its proper divisors (22378667011).

210221211101 is a wasteful number, since it uses less digits than its factorization.

210221211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11505904 (or 11505893 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210221211101 its reverse (101112122012), we get a palindrome (311333333113).

The spelling of 210221211101 in words is "two hundred ten billion, two hundred twenty-one million, two hundred eleven thousand, one hundred one".