121323615 has 32 divisors (see below), whose sum is σ = 229011456. Its totient is φ = 53671680.

The previous prime is 121323613. The next prime is 121323641. The reversal of 121323615 is 516323121.

It is not a de Polignac number, because 121323615 - 2¹ = 121323613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15382 + ... + 21891.

It is an arithmetic number, because the mean of its divisors is an integer number (7156608).

Almost surely, 2^121323615 is an apocalyptic number.

121323615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121323615 is a deficient number, since it is larger than the sum of its proper divisors (107687841).

121323615 is a wasteful number, since it uses less digits than its factorization.

121323615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37319.

The product of its digits is 1080, while the sum is 24.

The square root of 121323615 is about 11014.6999505207. The cubic root of 121323615 is about 495.0492961822.

Adding to 121323615 its reverse (516323121), we get a palindrome (637646736).

The spelling of 121323615 in words is "one hundred twenty-one million, three hundred twenty-three thousand, six hundred fifteen".