2001102121061 has 2 divisors, whose sum is σ = 2001102121062. Its totient is φ = 2001102121060.

The previous prime is 2001102121049. The next prime is 2001102121159. The reversal of 2001102121061 is 1601212011002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1918241620036 + 82860501025 = 1385006^2 + 287855^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001102121061 - 2¹⁰ = 2001102120037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001102121021) 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, 1000551060530 + 1000551060531.

It is an arithmetic number, because the mean of its divisors is an integer number (1000551060531).

Almost surely, 2^{2001102121061} is an apocalyptic number.

It is an amenable number.

2001102121061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001102121061 is an equidigital number, since it uses as much as digits as its factorization.

2001102121061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2001102121061 its reverse (1601212011002), we get a palindrome (3602314132063).

The spelling of 2001102121061 in words is "two trillion, one billion, one hundred two million, one hundred twenty-one thousand, sixty-one".