121403306 has 4 divisors (see below), whose sum is σ = 182104962. Its totient is φ = 60701652.

The previous prime is 121403299. The next prime is 121403311. The reversal of 121403306 is 603304121.

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., 66569281 + 54834025 = 8159^2 + 7405^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30350825 + ... + 30350828.

Almost surely, 2^121403306 is an apocalyptic number.

121403306 is a deficient number, since it is larger than the sum of its proper divisors (60701656).

121403306 is an equidigital number, since it uses as much as digits as its factorization.

121403306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60701655.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 121403306 is about 11018.3168406068. The cubic root of 121403306 is about 495.1576629358.

Adding to 121403306 its reverse (603304121), we get a palindrome (724707427).

The spelling of 121403306 in words is "one hundred twenty-one million, four hundred three thousand, three hundred six".