400011010001 has 4 divisors (see below), whose sum is σ = 406568567604. Its totient is φ = 393453452400.

The previous prime is 400011009973. The next prime is 400011010019. The reversal of 400011010001 is 100010110004.

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 10729852225 + 389281157776 = 103585^2 + 623924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400011010001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400011010031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3278778710 + ... + 3278778831.

It is an arithmetic number, because the mean of its divisors is an integer number (101642141901).

Almost surely, 2^400011010001 is an apocalyptic number.

It is an amenable number.

400011010001 is a deficient number, since it is larger than the sum of its proper divisors (6557557603).

400011010001 is an equidigital number, since it uses as much as digits as its factorization.

400011010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557557602.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 400011010001 its reverse (100010110004), we get a palindrome (500021120005).

The spelling of 400011010001 in words is "four hundred billion, eleven million, ten thousand, one".