11518464121 has 4 divisors (see below), whose sum is σ = 12196020852. Its totient is φ = 10840907392.

The previous prime is 11518464077. The next prime is 11518464161. The reversal of 11518464121 is 12146481511.

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 9050858496 + 2467605625 = 95136^2 + 49675^2 .

It is a cyclic number.

It is not a de Polignac number, because 11518464121 - 2⁹ = 11518463609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11518464161) 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, 338778340 + ... + 338778373.

It is an arithmetic number, because the mean of its divisors is an integer number (3049005213).

Almost surely, 2^11518464121 is an apocalyptic number.

It is an amenable number.

11518464121 is a deficient number, since it is larger than the sum of its proper divisors (677556731).

11518464121 is an equidigital number, since it uses as much as digits as its factorization.

11518464121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677556730.

The product of its digits is 7680, while the sum is 34.

The spelling of 11518464121 in words is "eleven billion, five hundred eighteen million, four hundred sixty-four thousand, one hundred twenty-one".