11269435721 has 8 divisors (see below), whose sum is σ = 11290210344. Its totient is φ = 11248680960.

The previous prime is 11269435631. The next prime is 11269435733. The reversal of 11269435721 is 12753496211.

It can be written as a sum of positive squares in 4 ways, for example, as 335805625 + 10933630096 = 18325^2 + 104564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11269435721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11269435621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1540745 + ... + 1548041.

It is an arithmetic number, because the mean of its divisors is an integer number (1411276293).

Almost surely, 2^11269435721 is an apocalyptic number.

It is an amenable number.

11269435721 is a deficient number, since it is larger than the sum of its proper divisors (20774623).

11269435721 is an equidigital number, since it uses as much as digits as its factorization.

11269435721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931.

The product of its digits is 90720, while the sum is 41.

The spelling of 11269435721 in words is "eleven billion, two hundred sixty-nine million, four hundred thirty-five thousand, seven hundred twenty-one".