11270511721 has 8 divisors (see below), whose sum is σ = 12881237760. Its totient is φ = 9659948928.

The previous prime is 11270511719. The next prime is 11270511737. The reversal of 11270511721 is 12711507211.

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

It is not a de Polignac number, because 11270511721 - 2¹ = 11270511719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11270511721.

It is not an unprimeable number, because it can be changed into a prime (11270511761) 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, 209520 + ... + 257758.

It is an arithmetic number, because the mean of its divisors is an integer number (1610154720).

Almost surely, 2^11270511721 is an apocalyptic number.

It is an amenable number.

11270511721 is a deficient number, since it is larger than the sum of its proper divisors (1610726039).

11270511721 is an equidigital number, since it uses as much as digits as its factorization.

11270511721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81623.

The product of its (nonzero) digits is 980, while the sum is 28.

The spelling of 11270511721 in words is "eleven billion, two hundred seventy million, five hundred eleven thousand, seven hundred twenty-one".