11121720367 has 4 divisors (see below), whose sum is σ = 11236377376. Its totient is φ = 11007063360.

The previous prime is 11121720353. The next prime is 11121720383. The reversal of 11121720367 is 76302712111.

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

It is a de Polignac number, because none of the positive numbers 2^k-11121720367 is a prime.

It is a super-2 number, since 2×11121720367² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121720317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57328359 + ... + 57328552.

It is an arithmetic number, because the mean of its divisors is an integer number (2809094344).

Almost surely, 2^11121720367 is an apocalyptic number.

11121720367 is a deficient number, since it is larger than the sum of its proper divisors (114657009).

11121720367 is an equidigital number, since it uses as much as digits as its factorization.

11121720367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114657008.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 11121720367 in words is "eleven billion, one hundred twenty-one million, seven hundred twenty thousand, three hundred sixty-seven".