2051207205161 has 2 divisors, whose sum is σ = 2051207205162. Its totient is φ = 2051207205160.

The previous prime is 2051207205121. The next prime is 2051207205169. The reversal of 2051207205161 is 1615027021502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1798162993936 + 253044211225 = 1340956^2 + 503035^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051207205161 - 2¹⁸ = 2051206943017 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 (2051207205169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025603602580 + 1025603602581.

It is an arithmetic number, because the mean of its divisors is an integer number (1025603602581).

Almost surely, 2^{2051207205161} is an apocalyptic number.

It is an amenable number.

2051207205161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051207205161 is an equidigital number, since it uses as much as digits as its factorization.

2051207205161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 2051207205161 in words is "two trillion, fifty-one billion, two hundred seven million, two hundred five thousand, one hundred sixty-one".