2001201220101 has 8 divisors (see below), whose sum is σ = 2668758715584. Its totient is φ = 1333888935680.

The previous prime is 2001201220001. The next prime is 2001201220157. The reversal of 2001201220101 is 1010221021002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001201220101 - 2²⁶ = 2001134111237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001201220001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61283721 + ... + 61316366.

It is an arithmetic number, because the mean of its divisors is an integer number (333594839448).

Almost surely, 2^{2001201220101} is an apocalyptic number.

It is an amenable number.

2001201220101 is a deficient number, since it is larger than the sum of its proper divisors (667557495483).

2001201220101 is a wasteful number, since it uses less digits than its factorization.

2001201220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122605531.

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

Adding to 2001201220101 its reverse (1010221021002), we get a palindrome (3011422241103).

It can be divided in two parts, 2001 and 201220101, that added together give a palindrome (201222102).

The spelling of 2001201220101 in words is "two trillion, one billion, two hundred one million, two hundred twenty thousand, one hundred one".