11125213513 has 4 divisors (see below), whose sum is σ = 11128047568. Its totient is φ = 11122379460.

The previous prime is 11125213493. The next prime is 11125213523. The reversal of 11125213513 is 31531252111.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11125213513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11125213523) 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, 1411131 + ... + 1418992.

It is an arithmetic number, because the mean of its divisors is an integer number (2782011892).

Almost surely, 2^11125213513 is an apocalyptic number.

It is an amenable number.

11125213513 is a deficient number, since it is larger than the sum of its proper divisors (2834055).

11125213513 is an equidigital number, since it uses as much as digits as its factorization.

11125213513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834054.

The product of its digits is 900, while the sum is 25.

Adding to 11125213513 its reverse (31531252111), we get a palindrome (42656465624).

The spelling of 11125213513 in words is "eleven billion, one hundred twenty-five million, two hundred thirteen thousand, five hundred thirteen".