11515101051 has 4 divisors (see below), whose sum is σ = 15353468072. Its totient is φ = 7676734032.

The previous prime is 11515101007. The next prime is 11515101077. The reversal of 11515101051 is 15010151511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15010151511 = 3 ⋅5003383837.

It is not a de Polignac number, because 11515101051 - 2¹⁰ = 11515100027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11515101251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1919183506 + ... + 1919183511.

It is an arithmetic number, because the mean of its divisors is an integer number (3838367018).

Almost surely, 2^11515101051 is an apocalyptic number.

11515101051 is a deficient number, since it is larger than the sum of its proper divisors (3838367021).

11515101051 is an equidigital number, since it uses as much as digits as its factorization.

11515101051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838367020.

The product of its (nonzero) digits is 125, while the sum is 21.

Adding to 11515101051 its reverse (15010151511), we get a palindrome (26525252562).

The spelling of 11515101051 in words is "eleven billion, five hundred fifteen million, one hundred one thousand, fifty-one".