11523121434342 has 192 divisors, whose sum is σ = 31184073930240. Its totient is φ = 3138913052352.

The previous prime is 11523121434287. The next prime is 11523121434437. The reversal of 11523121434342 is 24343412132511.

11523121434342 is a `hidden beast` number, since 1 + 1 + 5 + 2 + 3 + 1 + 214 + 3 + 434 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 11523121434297 and 11523121434306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18375028 + ... + 18991784.

It is an arithmetic number, because the mean of its divisors is an integer number (162417051720).

Almost surely, 2^{11523121434342} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11523121434342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15592036965120).

11523121434342 is an abundant number, since it is smaller than the sum of its proper divisors (19660952495898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11523121434342 is a wasteful number, since it uses less digits than its factorization.

11523121434342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617112 (or 617099 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 11523121434342 its reverse (24343412132511), we get a palindrome (35866533566853).

The spelling of 11523121434342 in words is "eleven trillion, five hundred twenty-three billion, one hundred twenty-one million, four hundred thirty-four thousand, three hundred forty-two".