400004020011401 has 4 divisors (see below), whose sum is σ = 430773560012292. Its totient is φ = 369234480010512.

The previous prime is 400004020011389. The next prime is 400004020011499. The reversal of 400004020011401 is 104110020400004.

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 158300407899001 + 241703612112400 = 12581749^2 + 15546820^2 .

It is a cyclic number.

It is not a de Polignac number, because 400004020011401 - 2¹⁰ = 400004020010377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400004020011401.

It is not an unprimeable number, because it can be changed into a prime (400004020013401) 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, 15384770000426 + ... + 15384770000451.

It is an arithmetic number, because the mean of its divisors is an integer number (107693390003073).

Almost surely, 2^{400004020011401} is an apocalyptic number.

It is an amenable number.

400004020011401 is a deficient number, since it is larger than the sum of its proper divisors (30769540000891).

400004020011401 is a wasteful number, since it uses less digits than its factorization.

400004020011401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30769540000890.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 400004020011401 its reverse (104110020400004), we get a palindrome (504114040411405).

The spelling of 400004020011401 in words is "four hundred trillion, four billion, twenty million, eleven thousand, four hundred one".