2021111020001 has 8 divisors (see below), whose sum is σ = 2054399951208. Its totient is φ = 1987827120000.

The previous prime is 2021111019923. The next prime is 2021111020039. The reversal of 2021111020001 is 1000201111202.

It can be written as a sum of positive squares in 4 ways, for example, as 353787040000 + 1667323980001 = 594800^2 + 1291249^2 .

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 2021111020001 - 2²⁶ = 2021043911137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021111020081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443450 + ... + 2058851.

It is an arithmetic number, because the mean of its divisors is an integer number (256799993901).

Almost surely, 2^{2021111020001} is an apocalyptic number.

It is an amenable number.

2021111020001 is a deficient number, since it is larger than the sum of its proper divisors (33288931207).

2021111020001 is a wasteful number, since it uses less digits than its factorization.

2021111020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515603.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2021111020001 its reverse (1000201111202), we get a palindrome (3021312131203).

The spelling of 2021111020001 in words is "two trillion, twenty-one billion, one hundred eleven million, twenty thousand, one".