2021001001121 has 2 divisors, whose sum is σ = 2021001001122. Its totient is φ = 2021001001120.

The previous prime is 2021001001091. The next prime is 2021001001153. The reversal of 2021001001121 is 1211001001202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1052870949025 + 968130052096 = 1026095^2 + 983936^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021001001121 - 2³⁴ = 2003821131937 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021001006121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010500500560 + 1010500500561.

It is an arithmetic number, because the mean of its divisors is an integer number (1010500500561).

Almost surely, 2^{2021001001121} is an apocalyptic number.

It is an amenable number.

2021001001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021001001121 is an equidigital number, since it uses as much as digits as its factorization.

2021001001121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2021001001121 its reverse (1211001001202), we get a palindrome (3232002002323).

The spelling of 2021001001121 in words is "two trillion, twenty-one billion, one million, one thousand, one hundred twenty-one".