11521123011166 has 4 divisors (see below), whose sum is σ = 17281684516752. Its totient is φ = 5760561505582.

The previous prime is 11521123011161. The next prime is 11521123011173. The reversal of 11521123011166 is 66111032112511.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521123011161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2880280752790 + ... + 2880280752793.

It is an arithmetic number, because the mean of its divisors is an integer number (4320421129188).

Almost surely, 2^{11521123011166} is an apocalyptic number.

11521123011166 is a deficient number, since it is larger than the sum of its proper divisors (5760561505586).

11521123011166 is an equidigital number, since it uses as much as digits as its factorization.

11521123011166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760561505585.

The product of its (nonzero) digits is 2160, while the sum is 31.

Adding to 11521123011166 its reverse (66111032112511), we get a palindrome (77632155123677).

The spelling of 11521123011166 in words is "eleven trillion, five hundred twenty-one billion, one hundred twenty-three million, eleven thousand, one hundred sixty-six".