121205146 has 4 divisors (see below), whose sum is σ = 181807722. Its totient is φ = 60602572.

The previous prime is 121205141. The next prime is 121205159. The reversal of 121205146 is 641502121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 108680625 + 12524521 = 10425^2 + 3539^2 .

It is not an unprimeable number, because it can be changed into a prime (121205141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30301285 + ... + 30301288.

Almost surely, 2^121205146 is an apocalyptic number.

121205146 is a deficient number, since it is larger than the sum of its proper divisors (60602576).

121205146 is an equidigital number, since it uses as much as digits as its factorization.

121205146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60602575.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 121205146 is about 11009.3208691545. The cubic root of 121205146 is about 494.8881099345. Note that the first 3 decimals are identical.

Adding to 121205146 its reverse (641502121), we get a palindrome (762707267).

The spelling of 121205146 in words is "one hundred twenty-one million, two hundred five thousand, one hundred forty-six".