121722512 has 40 divisors (see below), whose sum is σ = 256828800. Its totient is φ = 55665792.

The previous prime is 121722457. The next prime is 121722521. The reversal of 121722512 is 215227121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1913 + ... + 15719.

It is an arithmetic number, because the mean of its divisors is an integer number (6420720).

Almost surely, 2^121722512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121722512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128414400).

121722512 is an abundant number, since it is smaller than the sum of its proper divisors (135106288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121722512 is a wasteful number, since it uses less digits than its factorization.

121722512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13863 (or 13857 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 121722512 is about 11032.7925748652. The cubic root of 121722512 is about 495.5912562136.

Adding to 121722512 its reverse (215227121), we get a palindrome (336949633).

The spelling of 121722512 in words is "one hundred twenty-one million, seven hundred twenty-two thousand, five hundred twelve".