2128315061069 has 2 divisors, whose sum is σ = 2128315061070. Its totient is φ = 2128315061068.

The previous prime is 2128315061029. The next prime is 2128315061087. The reversal of 2128315061069 is 9601605138212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2057632458025 + 70682603044 = 1434445^2 + 265862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2128315061069 is a prime.

It is a super-2 number, since 2×2128315061069² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128315061029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064157530534 + 1064157530535.

It is an arithmetic number, because the mean of its divisors is an integer number (1064157530535).

Almost surely, 2^{2128315061069} is an apocalyptic number.

It is an amenable number.

2128315061069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128315061069 is an equidigital number, since it uses as much as digits as its factorization.

2128315061069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 2128315061069 in words is "two trillion, one hundred twenty-eight billion, three hundred fifteen million, sixty-one thousand, sixty-nine".