11521451411 has 4 divisors (see below), whose sum is σ = 11623411272. Its totient is φ = 11419491552.

The previous prime is 11521451407. The next prime is 11521451449. The reversal of 11521451411 is 11415412511.

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

It is a cyclic number.

It is not a de Polignac number, because 11521451411 - 2² = 11521451407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11521451471) 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, 50979761 + ... + 50979986.

It is an arithmetic number, because the mean of its divisors is an integer number (2905852818).

Almost surely, 2^11521451411 is an apocalyptic number.

11521451411 is a deficient number, since it is larger than the sum of its proper divisors (101959861).

11521451411 is a wasteful number, since it uses less digits than its factorization.

11521451411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101959860.

The product of its digits is 800, while the sum is 26.

Adding to 11521451411 its reverse (11415412511), we get a palindrome (22936863922).

The spelling of 11521451411 in words is "eleven billion, five hundred twenty-one million, four hundred fifty-one thousand, four hundred eleven".