11545160021 has 4 divisors (see below), whose sum is σ = 11703312972. Its totient is φ = 11387007072.

The previous prime is 11545160009. The next prime is 11545160047. The reversal of 11545160021 is 12006154511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2725884100 + 8819275921 = 52210^2 + 93911^2 .

It is a cyclic number.

It is not a de Polignac number, because 11545160021 - 2⁶ = 11545159957 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 (11545169021) 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, 79076366 + ... + 79076511.

It is an arithmetic number, because the mean of its divisors is an integer number (2925828243).

Almost surely, 2^11545160021 is an apocalyptic number.

It is an amenable number.

11545160021 is a deficient number, since it is larger than the sum of its proper divisors (158152951).

11545160021 is an equidigital number, since it uses as much as digits as its factorization.

11545160021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158152950.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 11545160021 in words is "eleven billion, five hundred forty-five million, one hundred sixty thousand, twenty-one".