2129807942671 has 2 divisors, whose sum is σ = 2129807942672. Its totient is φ = 2129807942670.

The previous prime is 2129807942641. The next prime is 2129807942723. The reversal of 2129807942671 is 1762497089212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2129807942671 - 2⁷ = 2129807942543 is a prime.

It is a super-2 number, since 2×2129807942671² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129807942611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064903971335 + 1064903971336.

It is an arithmetic number, because the mean of its divisors is an integer number (1064903971336).

Almost surely, 2^{2129807942671} is an apocalyptic number.

2129807942671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129807942671 is an equidigital number, since it uses as much as digits as its factorization.

2129807942671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 2129807942671 in words is "two trillion, one hundred twenty-nine billion, eight hundred seven million, nine hundred forty-two thousand, six hundred seventy-one".