221001210200001 has 128 divisors (see below), whose sum is σ = 383198393217024. Its totient is φ = 109967526789120.

The previous prime is 221001210199999. The next prime is 221001210200047. The reversal of 221001210200001 is 100002012100122.

It is not a de Polignac number, because 221001210200001 - 2¹ = 221001210199999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221001210200001.

It is not an unprimeable number, because it can be changed into a prime (221001210200201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1112287401 + ... + 1112486073.

It is an arithmetic number, because the mean of its divisors is an integer number (2993737447008).

Almost surely, 2^{221001210200001} is an apocalyptic number.

221001210200001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221001210200001 is a deficient number, since it is larger than the sum of its proper divisors (162197183017023).

221001210200001 is a wasteful number, since it uses less digits than its factorization.

221001210200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200903.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221001210200001 its reverse (100002012100122), we get a palindrome (321003222300123).

The spelling of 221001210200001 in words is "two hundred twenty-one trillion, one billion, two hundred ten million, two hundred thousand, one".