120151511917 has 4 divisors (see below), whose sum is σ = 125375490720. Its totient is φ = 114927533116.

The previous prime is 120151511863. The next prime is 120151511929. The reversal of 120151511917 is 719115151021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120151511917 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 (120151515917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2611989367 + ... + 2611989412.

It is an arithmetic number, because the mean of its divisors is an integer number (31343872680).

Almost surely, 2^120151511917 is an apocalyptic number.

It is an amenable number.

120151511917 is a deficient number, since it is larger than the sum of its proper divisors (5223978803).

120151511917 is an equidigital number, since it uses as much as digits as its factorization.

120151511917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223978802.

The product of its (nonzero) digits is 3150, while the sum is 34.

Adding to 120151511917 its reverse (719115151021), we get a palindrome (839266662938).

The spelling of 120151511917 in words is "one hundred twenty billion, one hundred fifty-one million, five hundred eleven thousand, nine hundred seventeen".