11520447401 has 4 divisors (see below), whose sum is σ = 11525531472. Its totient is φ = 11515363332.

The previous prime is 11520447353. The next prime is 11520447487. The reversal of 11520447401 is 10474402511.

It is a happy number.

11520447401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 10474402511 = 2791 ⋅3752921.

It is a cyclic number.

It is not a de Polignac number, because 11520447401 - 2²² = 11516253097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11520647401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538635 + ... + 2543168.

It is an arithmetic number, because the mean of its divisors is an integer number (2881382868).

Almost surely, 2^11520447401 is an apocalyptic number.

It is an amenable number.

11520447401 is a deficient number, since it is larger than the sum of its proper divisors (5084071).

11520447401 is an equidigital number, since it uses as much as digits as its factorization.

11520447401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084070.

The product of its (nonzero) digits is 4480, while the sum is 29.

Adding to 11520447401 its reverse (10474402511), we get a palindrome (21994849912).

The spelling of 11520447401 in words is "eleven billion, five hundred twenty million, four hundred forty-seven thousand, four hundred one".