11215821741 has 8 divisors (see below), whose sum is σ = 15122456640. Its totient is φ = 7393200672.

The previous prime is 11215821737. The next prime is 11215821751. The reversal of 11215821741 is 14712851211.

It is a happy number.

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

It is not a de Polignac number, because 11215821741 - 2² = 11215821737 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215821751) 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 7 ways as a sum of consecutive naturals, for example, 21003145 + ... + 21003678.

It is an arithmetic number, because the mean of its divisors is an integer number (1890307080).

Almost surely, 2^11215821741 is an apocalyptic number.

It is an amenable number.

11215821741 is a deficient number, since it is larger than the sum of its proper divisors (3906634899).

11215821741 is an equidigital number, since it uses as much as digits as its factorization.

11215821741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42006915.

The product of its digits is 4480, while the sum is 33.

The spelling of 11215821741 in words is "eleven billion, two hundred fifteen million, eight hundred twenty-one thousand, seven hundred forty-one".