11411223521 has 4 divisors (see below), whose sum is σ = 11413599252. Its totient is φ = 11408847792.

The previous prime is 11411223517. The next prime is 11411223529. The reversal of 11411223521 is 12532211411.

11411223521 = 75535² + 75536².

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

It can be written as a sum of positive squares in 2 ways, for example, as 5705687296 + 5705536225 = 75536^2 + 75535^2 .

It is a cyclic number.

It is not a de Polignac number, because 11411223521 - 2² = 11411223517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11411223529) 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, 1180646 + ... + 1190271.

It is an arithmetic number, because the mean of its divisors is an integer number (2853399813).

Almost surely, 2^11411223521 is an apocalyptic number.

11411223521 is the 75536-th centered square number.

It is an amenable number.

11411223521 is a deficient number, since it is larger than the sum of its proper divisors (2375731).

11411223521 is an equidigital number, since it uses as much as digits as its factorization.

11411223521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375730.

The product of its digits is 480, while the sum is 23.

Adding to 11411223521 its reverse (12532211411), we get a palindrome (23943434932).

The spelling of 11411223521 in words is "eleven billion, four hundred eleven million, two hundred twenty-three thousand, five hundred twenty-one".