2100000961 has 2 divisors, whose sum is σ = 2100000962. Its totient is φ = 2100000960.

The previous prime is 2100000949. The next prime is 2100000997. The reversal of 2100000961 is 1690000012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1419782400 + 680218561 = 37680^2 + 26081^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100000961 - 2⁹ = 2100000449 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100000911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050000480 + 1050000481.

It is an arithmetic number, because the mean of its divisors is an integer number (1050000481).

Almost surely, 2^2100000961 is an apocalyptic number.

It is an amenable number.

2100000961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100000961 is an equidigital number, since it uses as much as digits as its factorization.

2100000961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 2100000961 is about 45825.7674349268. The cubic root of 2100000961 is about 1280.5793603266.

Adding to 2100000961 its reverse (1690000012), we get a palindrome (3790000973).

The spelling of 2100000961 in words is "two billion, one hundred million, nine hundred sixty-one", and thus it is an aban number.