121722316 has 12 divisors (see below), whose sum is σ = 213095232. Its totient is φ = 60837968.

The previous prime is 121722311. The next prime is 121722323. The reversal of 121722316 is 613227121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121722311) 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 in 3 ways as a sum of consecutive naturals, for example, 12261 + ... + 19843.

It is an arithmetic number, because the mean of its divisors is an integer number (17757936).

Almost surely, 2^121722316 is an apocalyptic number.

It is an amenable number.

121722316 is a deficient number, since it is larger than the sum of its proper divisors (91372916).

121722316 is a wasteful number, since it uses less digits than its factorization.

121722316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11600 (or 11598 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 121722316 is about 11032.7836922510. The cubic root of 121722316 is about 495.5909902098.

Adding to 121722316 its reverse (613227121), we get a palindrome (734949437).

The spelling of 121722316 in words is "one hundred twenty-one million, seven hundred twenty-two thousand, three hundred sixteen".