11239867621 has 4 divisors (see below), whose sum is σ = 11241947200. Its totient is φ = 11237788044.

The previous prime is 11239867591. The next prime is 11239867637. The reversal of 11239867621 is 12676893211.

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 a cyclic number.

It is not a de Polignac number, because 11239867621 - 2¹⁷ = 11239736549 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 (11239867021) 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, 1031661 + ... + 1042498.

It is an arithmetic number, because the mean of its divisors is an integer number (2810486800).

Almost surely, 2^11239867621 is an apocalyptic number.

It is an amenable number.

11239867621 is a deficient number, since it is larger than the sum of its proper divisors (2079579).

11239867621 is an equidigital number, since it uses as much as digits as its factorization.

11239867621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079578.

The product of its digits is 217728, while the sum is 46.

The spelling of 11239867621 in words is "eleven billion, two hundred thirty-nine million, eight hundred sixty-seven thousand, six hundred twenty-one".