11221421239 has 4 divisors (see below), whose sum is σ = 12824481424. Its totient is φ = 9618361056.

The previous prime is 11221421219. The next prime is 11221421249. The reversal of 11221421239 is 93212412211.

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

It is a cyclic number.

It is not a de Polignac number, because 11221421239 - 2⁵ = 11221421207 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 (11221421209) 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, 801530082 + ... + 801530095.

It is an arithmetic number, because the mean of its divisors is an integer number (3206120356).

Almost surely, 2^11221421239 is an apocalyptic number.

11221421239 is a deficient number, since it is larger than the sum of its proper divisors (1603060185).

11221421239 is an equidigital number, since it uses as much as digits as its factorization.

11221421239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603060184.

The product of its digits is 1728, while the sum is 28.

The spelling of 11221421239 in words is "eleven billion, two hundred twenty-one million, four hundred twenty-one thousand, two hundred thirty-nine".