2961663121 has 2 divisors, whose sum is σ = 2961663122. Its totient is φ = 2961663120.

The previous prime is 2961663119. The next prime is 2961663127. The reversal of 2961663121 is 1213661692.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1725156225 + 1236506896 = 41535^2 + 35164^2 .

It is a cyclic number.

It is not a de Polignac number, because 2961663121 - 2¹ = 2961663119 is a prime.

Together with 2961663119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2961663127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1480831560 + 1480831561.

It is an arithmetic number, because the mean of its divisors is an integer number (1480831561).

Almost surely, 2^2961663121 is an apocalyptic number.

It is an amenable number.

2961663121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2961663121 is an equidigital number, since it uses as much as digits as its factorization.

2961663121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 2961663121 is about 54421.1642745724. The cubic root of 2961663121 is about 1436.0797307874.

The spelling of 2961663121 in words is "two billion, nine hundred sixty-one million, six hundred sixty-three thousand, one hundred twenty-one".