801811082129 has 2 divisors, whose sum is σ = 801811082130. Its totient is φ = 801811082128.

The previous prime is 801811082113. The next prime is 801811082197. The reversal of 801811082129 is 921280118108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 788503152529 + 13307929600 = 887977^2 + 115360^2 .

It is a cyclic number.

It is not a de Polignac number, because 801811082129 - 2⁴ = 801811082113 is a prime.

It is a super-2 number, since 2×801811082129² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (801811081129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400905541064 + 400905541065.

It is an arithmetic number, because the mean of its divisors is an integer number (400905541065).

Almost surely, 2^801811082129 is an apocalyptic number.

It is an amenable number.

801811082129 is a deficient number, since it is larger than the sum of its proper divisors (1).

801811082129 is an equidigital number, since it uses as much as digits as its factorization.

801811082129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 41.

The spelling of 801811082129 in words is "eight hundred one billion, eight hundred eleven million, eighty-two thousand, one hundred twenty-nine".