2021001121121 has 4 divisors (see below), whose sum is σ = 2127369601200. Its totient is φ = 1914632641044.

The previous prime is 2021001121063. The next prime is 2021001121127. The reversal of 2021001121121 is 1211211001202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2021001121121 - 2¹⁴ = 2021001104737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021001121096 and 2021001121105.

It is not an unprimeable number, because it can be changed into a prime (2021001121127) 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, 53184240011 + ... + 53184240048.

It is an arithmetic number, because the mean of its divisors is an integer number (531842400300).

Almost surely, 2^{2021001121121} is an apocalyptic number.

It is an amenable number.

2021001121121 is a deficient number, since it is larger than the sum of its proper divisors (106368480079).

2021001121121 is a wasteful number, since it uses less digits than its factorization.

2021001121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106368480078.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2021001121121 its reverse (1211211001202), we get a palindrome (3232212122323).

The spelling of 2021001121121 in words is "two trillion, twenty-one billion, one million, one hundred twenty-one thousand, one hundred twenty-one".