11520643021243 has 6 divisors (see below), whose sum is σ = 12158905792884. Its totient is φ = 10914293388204.

The previous prime is 11520643021231. The next prime is 11520643021247. The reversal of 11520643021243 is 34212034602511.

It is not a de Polignac number, because 11520643021243 - 2²⁵ = 11520609466811 is a prime.

It is a super-3 number, since 3×11520643021243³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11520643021199 and 11520643021208.

It is not an unprimeable number, because it can be changed into a prime (11520643021247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15956568921 + ... + 15956569642.

It is an arithmetic number, because the mean of its divisors is an integer number (2026484298814).

Almost surely, 2^{11520643021243} is an apocalyptic number.

11520643021243 is a deficient number, since it is larger than the sum of its proper divisors (638262771641).

11520643021243 is an equidigital number, since it uses as much as digits as its factorization.

11520643021243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31913138601 (or 31913138582 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 11520643021243 its reverse (34212034602511), we get a palindrome (45732677623754).

The spelling of 11520643021243 in words is "eleven trillion, five hundred twenty billion, six hundred forty-three million, twenty-one thousand, two hundred forty-three".