2021110002001 has 4 divisors (see below), whose sum is σ = 2029935810100. Its totient is φ = 2012284193904.

The previous prime is 2021110001923. The next prime is 2021110002007. The reversal of 2021110002001 is 1002000111202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1390038642001 + 631071360000 = 1178999^2 + 794400^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021110002001 - 2¹³ = 2021109993809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021110002007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4412903706 + ... + 4412904163.

It is an arithmetic number, because the mean of its divisors is an integer number (507483952525).

Almost surely, 2^{2021110002001} is an apocalyptic number.

It is an amenable number.

2021110002001 is a deficient number, since it is larger than the sum of its proper divisors (8825808099).

2021110002001 is an equidigital number, since it uses as much as digits as its factorization.

2021110002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825808098.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2021110002001 its reverse (1002000111202), we get a palindrome (3023110113203).

The spelling of 2021110002001 in words is "two trillion, twenty-one billion, one hundred ten million, two thousand, one".