11505400201 has 4 divisors (see below), whose sum is σ = 12110947600. Its totient is φ = 10899852804.

The previous prime is 11505400189. The next prime is 11505400211. The reversal of 11505400201 is 10200450511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10200450511 = 25639 ⋅397849.

It is a cyclic number.

It is not a de Polignac number, because 11505400201 - 2⁵ = 11505400169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 605547379 = 11505400201 / (1 + 1 + 5 + 0 + 5 + 4 + 0 + 0 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11505400211) 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, 302773671 + ... + 302773708.

It is an arithmetic number, because the mean of its divisors is an integer number (3027736900).

Almost surely, 2^11505400201 is an apocalyptic number.

It is an amenable number.

11505400201 is a deficient number, since it is larger than the sum of its proper divisors (605547399).

11505400201 is an equidigital number, since it uses as much as digits as its factorization.

11505400201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605547398.

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 11505400201 its reverse (10200450511), we get a palindrome (21705850712).

The spelling of 11505400201 in words is "eleven billion, five hundred five million, four hundred thousand, two hundred one".