840102401129 has 2 divisors, whose sum is σ = 840102401130. Its totient is φ = 840102401128.

The previous prime is 840102401101. The next prime is 840102401197. The reversal of 840102401129 is 921104201048.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 722751621904 + 117350779225 = 850148^2 + 342565^2 .

It is a cyclic number.

It is not a de Polignac number, because 840102401129 - 2¹² = 840102397033 is a prime.

It is a super-2 number, since 2×840102401129² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 840102401095 and 840102401104.

It is not a weakly prime, because it can be changed into another prime (840102404129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420051200564 + 420051200565.

It is an arithmetic number, because the mean of its divisors is an integer number (420051200565).

Almost surely, 2^840102401129 is an apocalyptic number.

It is an amenable number.

840102401129 is a deficient number, since it is larger than the sum of its proper divisors (1).

840102401129 is an equidigital number, since it uses as much as digits as its factorization.

840102401129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 840102401129 in words is "eight hundred forty billion, one hundred two million, four hundred one thousand, one hundred twenty-nine".