12240948419891 has 4 divisors (see below), whose sum is σ = 12241019759784. Its totient is φ = 12240877080000.

The previous prime is 12240948419771. The next prime is 12240948419933. The reversal of 12240948419891 is 19891484904221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12240948419891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12240948419191) 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, 35411945 + ... + 35755946.

It is an arithmetic number, because the mean of its divisors is an integer number (3060254939946).

Almost surely, 2^{12240948419891} is an apocalyptic number.

12240948419891 is a deficient number, since it is larger than the sum of its proper divisors (71339893).

12240948419891 is an equidigital number, since it uses as much as digits as its factorization.

12240948419891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71339892.

The product of its (nonzero) digits is 11943936, while the sum is 62.

The spelling of 12240948419891 in words is "twelve trillion, two hundred forty billion, nine hundred forty-eight million, four hundred nineteen thousand, eight hundred ninety-one".