11121721367 has 4 divisors (see below), whose sum is σ = 11122220616. Its totient is φ = 11121222120.

The previous prime is 11121721327. The next prime is 11121721393. The reversal of 11121721367 is 76312712111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76312712111 = 257 ⋅296936623.

It is a cyclic number.

It is not a de Polignac number, because 11121721367 - 2³² = 6826754071 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 (11121721327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214568 + ... + 261309.

It is an arithmetic number, because the mean of its divisors is an integer number (2780555154).

Almost surely, 2^11121721367 is an apocalyptic number.

11121721367 is a deficient number, since it is larger than the sum of its proper divisors (499249).

11121721367 is an equidigital number, since it uses as much as digits as its factorization.

11121721367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499248.

The product of its digits is 3528, while the sum is 32.

The spelling of 11121721367 in words is "eleven billion, one hundred twenty-one million, seven hundred twenty-one thousand, three hundred sixty-seven".