121205113 has 4 divisors (see below), whose sum is σ = 121276240. Its totient is φ = 121133988.

The previous prime is 121205111. The next prime is 121205141. The reversal of 121205113 is 311502121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121205113 - 2¹ = 121205111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121205111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32943 + ... + 36436.

It is an arithmetic number, because the mean of its divisors is an integer number (30319060).

Almost surely, 2^121205113 is an apocalyptic number.

It is an amenable number.

121205113 is a deficient number, since it is larger than the sum of its proper divisors (71127).

121205113 is an equidigital number, since it uses as much as digits as its factorization.

121205113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71126.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 121205113 is about 11009.3193704243. The cubic root of 121205113 is about 494.8880650208. Note that the first 3 decimals are identical.

Adding to 121205113 its reverse (311502121), we get a palindrome (432707234).

The spelling of 121205113 in words is "one hundred twenty-one million, two hundred five thousand, one hundred thirteen".