12101505 has 32 divisors (see below), whose sum is σ = 21020160. Its totient is φ = 5909760.

The previous prime is 12101477. The next prime is 12101527. The reversal of 12101505 is 50510121.

It is not a de Polignac number, because 12101505 - 2⁹ = 12100993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44520 + ... + 44790.

It is an arithmetic number, because the mean of its divisors is an integer number (656880).

Almost surely, 2^12101505 is an apocalyptic number.

12101505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12101505 is a deficient number, since it is larger than the sum of its proper divisors (8918655).

12101505 is a wasteful number, since it uses less digits than its factorization.

12101505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 12101505 is about 3478.7217479988. The cubic root of 12101505 is about 229.5865603488.

Adding to 12101505 its reverse (50510121), we get a palindrome (62611626).

The spelling of 12101505 in words is "twelve million, one hundred one thousand, five hundred five".