11520155213225 has 12 divisors (see below), whose sum is σ = 14285547096156. Its totient is φ = 9215766343680.

The previous prime is 11520155213207. The next prime is 11520155213227. The reversal of 11520155213225 is 52231255102511.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 90184294249 + 11429970918976 = 300307^2 + 3380824^2 .

It is not a de Polignac number, because 11520155213225 - 2¹⁴ = 11520155196841 is a prime.

It is a super-4 number, since 4×11520155213225⁴ (a number of 53 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11520155213227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8287952 + ... + 9577601.

It is an arithmetic number, because the mean of its divisors is an integer number (1190462258013).

Almost surely, 2^{11520155213225} is an apocalyptic number.

It is an amenable number.

11520155213225 is a deficient number, since it is larger than the sum of its proper divisors (2765391882931).

11520155213225 is a wasteful number, since it uses less digits than its factorization.

11520155213225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17891356 (or 17891351 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 11520155213225 in words is "eleven trillion, five hundred twenty billion, one hundred fifty-five million, two hundred thirteen thousand, two hundred twenty-five".