11225345521 has 32 divisors (see below), whose sum is σ = 13072752000. Its totient is φ = 9550130688.

The previous prime is 11225345507. The next prime is 11225345539. The reversal of 11225345521 is 12554352211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11225345521 is a prime.

It is a super-2 number, since 2×11225345521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11225345581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2855085 + ... + 2859013.

It is an arithmetic number, because the mean of its divisors is an integer number (408523500).

Almost surely, 2^11225345521 is an apocalyptic number.

It is an amenable number.

11225345521 is a deficient number, since it is larger than the sum of its proper divisors (1847406479).

11225345521 is a wasteful number, since it uses less digits than its factorization.

11225345521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273.

The product of its digits is 12000, while the sum is 31.

Adding to 11225345521 its reverse (12554352211), we get a palindrome (23779697732).

The spelling of 11225345521 in words is "eleven billion, two hundred twenty-five million, three hundred forty-five thousand, five hundred twenty-one".