121810316 has 6 divisors (see below), whose sum is σ = 213168060. Its totient is φ = 60905156.

The previous prime is 121810313. The next prime is 121810333. The reversal of 121810316 is 613018121.

It is a junction number, because it is equal to n+sod(n) for n = 121810291 and 121810300.

It is not an unprimeable number, because it can be changed into a prime (121810313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15226286 + ... + 15226293.

It is an arithmetic number, because the mean of its divisors is an integer number (35528010).

Almost surely, 2^121810316 is an apocalyptic number.

It is an amenable number.

121810316 is a deficient number, since it is larger than the sum of its proper divisors (91357744).

121810316 is a wasteful number, since it uses less digits than its factorization.

121810316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30452583 (or 30452581 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 121810316 is about 11036.7710857841. The cubic root of 121810316 is about 495.7103917650.

Adding to 121810316 its reverse (613018121), we get a palindrome (734828437).

The spelling of 121810316 in words is "one hundred twenty-one million, eight hundred ten thousand, three hundred sixteen".