123115011 has 8 divisors (see below), whose sum is σ = 166402320. Its totient is φ = 80952192.

The previous prime is 123115009. The next prime is 123115033. The reversal of 123115011 is 110511321.

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

It is not a de Polignac number, because 123115011 - 2¹ = 123115009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123115001) 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 7 ways as a sum of consecutive naturals, for example, 280866 + ... + 281303.

It is an arithmetic number, because the mean of its divisors is an integer number (20800290).

Almost surely, 2^123115011 is an apocalyptic number.

123115011 is a deficient number, since it is larger than the sum of its proper divisors (43287309).

123115011 is an equidigital number, since it uses as much as digits as its factorization.

123115011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562245.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 123115011 is about 11095.7203912139. The cubic root of 123115011 is about 497.4739408756.

Adding to 123115011 its reverse (110511321), we get a palindrome (233626332).

The spelling of 123115011 in words is "one hundred twenty-three million, one hundred fifteen thousand, eleven".