11355121807 has 4 divisors (see below), whose sum is σ = 11355683256. Its totient is φ = 11354560360.

The previous prime is 11355121787. The next prime is 11355121819. The reversal of 11355121807 is 70812155311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70812155311 = 29 ⋅2441798459.

It is a cyclic number.

It is not a de Polignac number, because 11355121807 - 2³¹ = 9207638159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11355121847) 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, 249208 + ... + 291229.

It is an arithmetic number, because the mean of its divisors is an integer number (2838920814).

Almost surely, 2^11355121807 is an apocalyptic number.

11355121807 is a deficient number, since it is larger than the sum of its proper divisors (561449).

11355121807 is an equidigital number, since it uses as much as digits as its factorization.

11355121807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561448.

The product of its (nonzero) digits is 8400, while the sum is 34.

The spelling of 11355121807 in words is "eleven billion, three hundred fifty-five million, one hundred twenty-one thousand, eight hundred seven".