2001221110201 has 16 divisors (see below), whose sum is σ = 2108653747200. Its totient is φ = 1895493021840.

The previous prime is 2001221110159. The next prime is 2001221110223. The reversal of 2001221110201 is 1020111221002.

It is not a de Polignac number, because 2001221110201 - 2⁹ = 2001221109689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001221510201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54703246 + ... + 54739816.

It is an arithmetic number, because the mean of its divisors is an integer number (131790859200).

Almost surely, 2^{2001221110201} is an apocalyptic number.

It is an amenable number.

2001221110201 is a deficient number, since it is larger than the sum of its proper divisors (107432636999).

2001221110201 is a wasteful number, since it uses less digits than its factorization.

2001221110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59796.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001221110201 its reverse (1020111221002), we get a palindrome (3021332331203).

The spelling of 2001221110201 in words is "two trillion, one billion, two hundred twenty-one million, one hundred ten thousand, two hundred one".