11242120357 has 4 divisors (see below), whose sum is σ = 12106898860. Its totient is φ = 10377341856.

The previous prime is 11242120321. The next prime is 11242120399. The reversal of 11242120357 is 75302124211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75302124211 = 31 ⋅2429100781.

It can be written as a sum of positive squares in 2 ways, for example, as 5765972356 + 5476148001 = 75934^2 + 74001^2 .

It is a cyclic number.

It is not a de Polignac number, because 11242120357 - 2¹⁵ = 11242087589 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 (11242127357) 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, 432389232 + ... + 432389257.

It is an arithmetic number, because the mean of its divisors is an integer number (3026724715).

Almost surely, 2^11242120357 is an apocalyptic number.

It is an amenable number.

11242120357 is a deficient number, since it is larger than the sum of its proper divisors (864778503).

11242120357 is an equidigital number, since it uses as much as digits as its factorization.

11242120357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864778502.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 11242120357 its reverse (75302124211), we get a palindrome (86544244568).

The spelling of 11242120357 in words is "eleven billion, two hundred forty-two million, one hundred twenty thousand, three hundred fifty-seven".