221010212110101 has 64 divisors (see below), whose sum is σ = 306358076344320. Its totient is φ = 141571510272000.

The previous prime is 221010212109997. The next prime is 221010212110109. The reversal of 221010212110101 is 101011212010122.

It is a happy number.

It is not a de Polignac number, because 221010212110101 - 2¹¹ = 221010212108053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010212110109) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51529541365 + ... + 51529545653.

It is an arithmetic number, because the mean of its divisors is an integer number (4786844942880).

Almost surely, 2^{221010212110101} is an apocalyptic number.

It is an amenable number.

221010212110101 is a deficient number, since it is larger than the sum of its proper divisors (85347864234219).

221010212110101 is a wasteful number, since it uses less digits than its factorization.

221010212110101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8078.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221010212110101 its reverse (101011212010122), we get a palindrome (322021424120223).

The spelling of 221010212110101 in words is "two hundred twenty-one trillion, ten billion, two hundred twelve million, one hundred ten thousand, one hundred one".