121601115 has 32 divisors (see below), whose sum is σ = 225584640. Its totient is φ = 62032608.

The previous prime is 121601107. The next prime is 121601131. The reversal of 121601115 is 511106121.

It is a happy number.

It is not a de Polignac number, because 121601115 - 2³ = 121601107 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16477 + ... + 22686.

It is an arithmetic number, because the mean of its divisors is an integer number (7049520).

Almost surely, 2^121601115 is an apocalyptic number.

121601115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121601115 is a deficient number, since it is larger than the sum of its proper divisors (103983525).

121601115 is a wasteful number, since it uses less digits than its factorization.

121601115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39200 (or 39194 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

The square root of 121601115 is about 11027.2895581825. The cubic root of 121601115 is about 495.4264460985.

Adding to 121601115 its reverse (511106121), we get a palindrome (632707236).

The spelling of 121601115 in words is "one hundred twenty-one million, six hundred one thousand, one hundred fifteen".