2021112100001 has 4 divisors (see below), whose sum is σ = 2026903252500. Its totient is φ = 2015320947504.

The previous prime is 2021112099983. The next prime is 2021112100009. The reversal of 2021112100001 is 1000012111202.

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 1402649392225 + 618462707776 = 1184335^2 + 786424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021112100001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021112100009) 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, 2895575726 + ... + 2895576423.

It is an arithmetic number, because the mean of its divisors is an integer number (506725813125).

Almost surely, 2^{2021112100001} is an apocalyptic number.

It is an amenable number.

2021112100001 is a deficient number, since it is larger than the sum of its proper divisors (5791152499).

2021112100001 is an equidigital number, since it uses as much as digits as its factorization.

2021112100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5791152498.

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

Adding to 2021112100001 its reverse (1000012111202), we get a palindrome (3021124211203).

The spelling of 2021112100001 in words is "two trillion, twenty-one billion, one hundred twelve million, one hundred thousand, one".