11211011523 has 16 divisors (see below), whose sum is σ = 17144678400. Its totient is φ = 7232910120.

The previous prime is 11211011491. The next prime is 11211011531. The reversal of 11211011523 is 32511011211.

11211011523 is a `hidden beast` number, since 1 + 121 + 10 + 11 + 523 = 666.

It is not a de Polignac number, because 11211011523 - 2⁵ = 11211011491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11211011496 and 11211011505.

It is not an unprimeable number, because it can be changed into a prime (11211011593) 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, 6696303 + ... + 6697976.

It is an arithmetic number, because the mean of its divisors is an integer number (1071542400).

Almost surely, 2^11211011523 is an apocalyptic number.

11211011523 is a deficient number, since it is larger than the sum of its proper divisors (5933666877).

11211011523 is a wasteful number, since it uses less digits than its factorization.

11211011523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13394319 (or 13394313 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

Adding to 11211011523 its reverse (32511011211), we get a palindrome (43722022734).

The spelling of 11211011523 in words is "eleven billion, two hundred eleven million, eleven thousand, five hundred twenty-three".