11211242523 has 16 divisors (see below), whose sum is σ = 16111665696. Its totient is φ = 6893452800.

The previous prime is 11211242509. The next prime is 11211242591. The reversal of 11211242523 is 32524211211.

It is a happy number.

It is not a de Polignac number, because 11211242523 - 2⁴ = 11211242507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11211242493 and 11211242502.

It is not an unprimeable number, because it can be changed into a prime (11211243523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72840 + ... + 166517.

It is an arithmetic number, because the mean of its divisors is an integer number (1006979106).

Almost surely, 2^11211242523 is an apocalyptic number.

11211242523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11211242523 is a deficient number, since it is larger than the sum of its proper divisors (4900423173).

11211242523 is a wasteful number, since it uses less digits than its factorization.

11211242523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240574.

The product of its digits is 960, while the sum is 24.

Adding to 11211242523 its reverse (32524211211), we get a palindrome (43735453734).

The spelling of 11211242523 in words is "eleven billion, two hundred eleven million, two hundred forty-two thousand, five hundred twenty-three".