121009605 has 32 divisors (see below), whose sum is σ = 201744000. Its totient is φ = 61861632.

The previous prime is 121009597. The next prime is 121009627. The reversal of 121009605 is 506900121.

It is not a de Polignac number, because 121009605 - 2³ = 121009597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63882 + ... + 65748.

It is an arithmetic number, because the mean of its divisors is an integer number (6304500).

Almost surely, 2^121009605 is an apocalyptic number.

121009605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121009605 is a deficient number, since it is larger than the sum of its proper divisors (80734395).

121009605 is a wasteful number, since it uses less digits than its factorization.

121009605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 121009605 is about 11000.4365822453. The cubic root of 121009605 is about 494.6218313532.

Adding to 121009605 its reverse (506900121), we get a palindrome (627909726).

The spelling of 121009605 in words is "one hundred twenty-one million, nine thousand, six hundred five".