11111040401 has 4 divisors (see below), whose sum is σ = 11221050804. Its totient is φ = 11001030000.

The previous prime is 11111040377. The next prime is 11111040403. The reversal of 11111040401 is 10404011111.

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 10936139776 + 174900625 = 104576^2 + 13225^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111040401 - 2³⁰ = 10037298577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111040403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55005050 + ... + 55005251.

It is an arithmetic number, because the mean of its divisors is an integer number (2805262701).

Almost surely, 2^11111040401 is an apocalyptic number.

It is an amenable number.

11111040401 is a deficient number, since it is larger than the sum of its proper divisors (110010403).

11111040401 is a wasteful number, since it uses less digits than its factorization.

11111040401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110010402.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11111040401 its reverse (10404011111), we get a palindrome (21515051512).

It can be divided in two parts, 1111 and 1040401, that multiplied together give a palindrome (1155885511).

The spelling of 11111040401 in words is "eleven billion, one hundred eleven million, forty thousand, four hundred one".