2021201111001 has 8 divisors (see below), whose sum is σ = 2705181716160. Its totient is φ = 1342343956592.

The previous prime is 2021201110967. The next prime is 2021201111011. The reversal of 2021201111001 is 1001111021202.

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 2021201111001 - 2³⁰ = 2020127369177 is a prime.

It is a super-2 number, since 2×2021201111001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021201111011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280861766 + ... + 1280863343.

It is an arithmetic number, because the mean of its divisors is an integer number (338147714520).

Almost surely, 2^{2021201111001} is an apocalyptic number.

It is an amenable number.

2021201111001 is a deficient number, since it is larger than the sum of its proper divisors (683980605159).

2021201111001 is a wasteful number, since it uses less digits than its factorization.

2021201111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561725375.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2021201111001 its reverse (1001111021202), we get a palindrome (3022312132203).

The spelling of 2021201111001 in words is "two trillion, twenty-one billion, two hundred one million, one hundred eleven thousand, one".