221211000101 has 24 divisors (see below), whose sum is σ = 273836105280. Its totient is φ = 174972635136.

The previous prime is 221211000091. The next prime is 221211000191. The reversal of 221211000101 is 101000112122.

It is not a de Polignac number, because 221211000101 - 2¹⁴ = 221210983717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211000191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4284005 + ... + 4335333.

It is an arithmetic number, because the mean of its divisors is an integer number (11409837720).

Almost surely, 2^221211000101 is an apocalyptic number.

It is an amenable number.

221211000101 is a deficient number, since it is larger than the sum of its proper divisors (52625105179).

221211000101 is a wasteful number, since it uses less digits than its factorization.

221211000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55005 (or 54992 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221211000101 its reverse (101000112122), we get a palindrome (322211112223).

The spelling of 221211000101 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred one", and thus it is an aban number.