11661215141001 has 4 divisors (see below), whose sum is σ = 15548286854672. Its totient is φ = 7774143427332.

The previous prime is 11661215140987. The next prime is 11661215141021. The reversal of 11661215141001 is 10014151216611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11661215141001 - 2²⁵ = 11661181586569 is a prime.

It is a super-2 number, since 2×11661215141001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11661215141001.

It is not an unprimeable number, because it can be changed into a prime (11661215141021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943535856831 + ... + 1943535856836.

It is an arithmetic number, because the mean of its divisors is an integer number (3887071713668).

Almost surely, 2^{11661215141001} is an apocalyptic number.

It is an amenable number.

11661215141001 is a deficient number, since it is larger than the sum of its proper divisors (3887071713671).

11661215141001 is an equidigital number, since it uses as much as digits as its factorization.

11661215141001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887071713670.

The product of its (nonzero) digits is 1440, while the sum is 30.

Adding to 11661215141001 its reverse (10014151216611), we get a palindrome (21675366357612).

The spelling of 11661215141001 in words is "eleven trillion, six hundred sixty-one billion, two hundred fifteen million, one hundred forty-one thousand, one".