11252443121 has 4 divisors (see below), whose sum is σ = 11281370100. Its totient is φ = 11223516144.

The previous prime is 11252443117. The next prime is 11252443151. The reversal of 11252443121 is 12134425211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12134425211 = 5903 ⋅2055637.

It can be written as a sum of positive squares in 2 ways, for example, as 6771479521 + 4480963600 = 82289^2 + 66940^2 .

It is a cyclic number.

It is not a de Polignac number, because 11252443121 - 2² = 11252443117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11252443151) 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, 14462906 + ... + 14463683.

It is an arithmetic number, because the mean of its divisors is an integer number (2820342525).

Almost surely, 2^11252443121 is an apocalyptic number.

It is an amenable number.

11252443121 is a deficient number, since it is larger than the sum of its proper divisors (28926979).

11252443121 is an equidigital number, since it uses as much as digits as its factorization.

11252443121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28926978.

The product of its digits is 1920, while the sum is 26.

Adding to 11252443121 its reverse (12134425211), we get a palindrome (23386868332).

The spelling of 11252443121 in words is "eleven billion, two hundred fifty-two million, four hundred forty-three thousand, one hundred twenty-one".