11520643465021 has 8 divisors (see below), whose sum is σ = 11964514146464. Its totient is φ = 11084770453680.

The previous prime is 11520643465013. The next prime is 11520643465027. The reversal of 11520643465021 is 12056434602511.

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

It is a cyclic number.

It is not a de Polignac number, because 11520643465021 - 2³ = 11520643465013 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 (11520643465027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1999414590 + ... + 1999420351.

It is an arithmetic number, because the mean of its divisors is an integer number (1495564268308).

Almost surely, 2^{11520643465021} is an apocalyptic number.

It is an amenable number.

11520643465021 is a deficient number, since it is larger than the sum of its proper divisors (443870681443).

11520643465021 is an equidigital number, since it uses as much as digits as its factorization.

11520643465021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998835051.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 11520643465021 in words is "eleven trillion, five hundred twenty billion, six hundred forty-three million, four hundred sixty-five thousand, twenty-one".