2001011220201 has 16 divisors (see below), whose sum is σ = 3049199541248. Its totient is φ = 1143420138000.

The previous prime is 2001011220191. The next prime is 2001011220203. The reversal of 2001011220201 is 1020221101002.

It is not a de Polignac number, because 2001011220201 - 2⁷ = 2001011220073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001011220203) 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, 1155876 + ... + 2310426.

It is an arithmetic number, because the mean of its divisors is an integer number (190574971328).

Almost surely, 2^{2001011220201} is an apocalyptic number.

2001011220201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2001011220201 is a deficient number, since it is larger than the sum of its proper divisors (1048188321047).

2001011220201 is a wasteful number, since it uses less digits than its factorization.

2001011220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237092.

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

Adding to 2001011220201 its reverse (1020221101002), we get a palindrome (3021232321203).

The spelling of 2001011220201 in words is "two trillion, one billion, eleven million, two hundred twenty thousand, two hundred one".