121231306 has 16 divisors (see below), whose sum is σ = 208604160. Its totient is φ = 51761520.

The previous prime is 121231303. The next prime is 121231379. The reversal of 121231306 is 603132121.

It is not an unprimeable number, because it can be changed into a prime (121231303) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 12330 + ... + 19861.

It is an arithmetic number, because the mean of its divisors is an integer number (13037760).

Almost surely, 2^121231306 is an apocalyptic number.

121231306 is a deficient number, since it is larger than the sum of its proper divisors (87372854).

121231306 is a wasteful number, since it uses less digits than its factorization.

121231306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32469.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 121231306 is about 11010.5088892385. The cubic root of 121231306 is about 494.9237116728.

Adding to 121231306 its reverse (603132121), we get a palindrome (724363427).

The spelling of 121231306 in words is "one hundred twenty-one million, two hundred thirty-one thousand, three hundred six".