11272739021 has 8 divisors (see below), whose sum is σ = 11543702400. Its totient is φ = 11004982560.

The previous prime is 11272738991. The next prime is 11272739063. The reversal of 11272739021 is 12093727211.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11272739021 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 (11272759021) 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, 794615 + ... + 808676.

It is an arithmetic number, because the mean of its divisors is an integer number (1442962800).

Almost surely, 2^11272739021 is an apocalyptic number.

It is an amenable number.

11272739021 is a deficient number, since it is larger than the sum of its proper divisors (270963379).

11272739021 is an equidigital number, since it uses as much as digits as its factorization.

11272739021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603459.

The product of its (nonzero) digits is 10584, while the sum is 35.

The spelling of 11272739021 in words is "eleven billion, two hundred seventy-two million, seven hundred thirty-nine thousand, twenty-one".