2101002001121 has 2 divisors, whose sum is σ = 2101002001122. Its totient is φ = 2101002001120.

The previous prime is 2101002001117. The next prime is 2101002001181. The reversal of 2101002001121 is 1211002001012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1900714424896 + 200287576225 = 1378664^2 + 447535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101002001121 - 2² = 2101002001117 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101002001181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050501000560 + 1050501000561.

It is an arithmetic number, because the mean of its divisors is an integer number (1050501000561).

Almost surely, 2^{2101002001121} is an apocalyptic number.

It is an amenable number.

2101002001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101002001121 is an equidigital number, since it uses as much as digits as its factorization.

2101002001121 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 2101002001121 its reverse (1211002001012), we get a palindrome (3312004002133).

The spelling of 2101002001121 in words is "two trillion, one hundred one billion, two million, one thousand, one hundred twenty-one".