2021001121001 has 8 divisors (see below), whose sum is σ = 2023062739584. Its totient is φ = 2018939700960.

The previous prime is 2021001120979. The next prime is 2021001121063. The reversal of 2021001121001 is 1001211001202.

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 2021001121001 - 2³⁰ = 2019927379177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021001121201) 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, 28675061 + ... + 28745453.

It is an arithmetic number, because the mean of its divisors is an integer number (252882842448).

Almost surely, 2^{2021001121001} is an apocalyptic number.

It is an amenable number.

2021001121001 is a deficient number, since it is larger than the sum of its proper divisors (2061618583).

2021001121001 is a wasteful number, since it uses less digits than its factorization.

2021001121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99271.

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

Adding to 2021001121001 its reverse (1001211001202), we get a palindrome (3022212122203).

The spelling of 2021001121001 in words is "two trillion, twenty-one billion, one million, one hundred twenty-one thousand, one".