221001201121001 has 16 divisors (see below), whose sum is σ = 255641392406400. Its totient is φ = 187128613784448.

The previous prime is 221001201120991. The next prime is 221001201121037. The reversal of 221001201121001 is 100121102100122.

It is a de Polignac number, because none of the positive numbers 2^k-221001201121001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221001201121081) 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 15 ways as a sum of consecutive naturals, for example, 13186706 + ... + 24817163.

It is an arithmetic number, because the mean of its divisors is an integer number (15977587025400).

Almost surely, 2^{221001201121001} is an apocalyptic number.

It is an amenable number.

221001201121001 is a deficient number, since it is larger than the sum of its proper divisors (34640191285399).

221001201121001 is a wasteful number, since it uses less digits than its factorization.

221001201121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38013968.

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

Adding to 221001201121001 its reverse (100121102100122), we get a palindrome (321122303221123).

The spelling of 221001201121001 in words is "two hundred twenty-one trillion, one billion, two hundred one million, one hundred twenty-one thousand, one".