11751221067 has 8 divisors (see below), whose sum is σ = 15685164240. Its totient is φ = 7825712640.

The previous prime is 11751221059. The next prime is 11751221077. The reversal of 11751221067 is 76012215711.

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

It is not a de Polignac number, because 11751221067 - 2³ = 11751221059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11751221017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2105434 + ... + 2111007.

It is an arithmetic number, because the mean of its divisors is an integer number (1960645530).

Almost surely, 2^11751221067 is an apocalyptic number.

11751221067 is a deficient number, since it is larger than the sum of its proper divisors (3933943173).

11751221067 is an equidigital number, since it uses as much as digits as its factorization.

11751221067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217373.

The product of its (nonzero) digits is 5880, while the sum is 33.

Adding to 11751221067 its reverse (76012215711), we get a palindrome (87763436778).

The spelling of 11751221067 in words is "eleven billion, seven hundred fifty-one million, two hundred twenty-one thousand, sixty-seven".