2021120110001 has 2 divisors, whose sum is σ = 2021120110002. Its totient is φ = 2021120110000.

The previous prime is 2021120109979. The next prime is 2021120110073. The reversal of 2021120110001 is 1000110211202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1652057784976 + 369062325025 = 1285324^2 + 607505^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021120110001 - 2⁶ = 2021120109937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2021120100001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010560055000 + 1010560055001.

It is an arithmetic number, because the mean of its divisors is an integer number (1010560055001).

Almost surely, 2^{2021120110001} is an apocalyptic number.

It is an amenable number.

2021120110001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021120110001 is an equidigital number, since it uses as much as digits as its factorization.

2021120110001 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 2021120110001 its reverse (1000110211202), we get a palindrome (3021230321203).

The spelling of 2021120110001 in words is "two trillion, twenty-one billion, one hundred twenty million, one hundred ten thousand, one".