399011001100001 has 4 divisors (see below), whose sum is σ = 406539510554772. Its totient is φ = 391482491645232.

The previous prime is 399011001099869. The next prime is 399011001100069. The reversal of 399011001100001 is 100001100110993.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 285388619115601 + 113622381984400 = 16893449^2 + 10659380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399011001100001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399011001150001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3764254727306 + ... + 3764254727411.

It is an arithmetic number, because the mean of its divisors is an integer number (101634877638693).

Almost surely, 2^{399011001100001} is an apocalyptic number.

It is an amenable number.

399011001100001 is a deficient number, since it is larger than the sum of its proper divisors (7528509454771).

399011001100001 is an equidigital number, since it uses as much as digits as its factorization.

399011001100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7528509454770.

The product of its (nonzero) digits is 243, while the sum is 26.

Adding to 399011001100001 its reverse (100001100110993), we get a palindrome (499012101210994).

The spelling of 399011001100001 in words is "three hundred ninety-nine trillion, eleven billion, one million, one hundred thousand, one".