121722368 has 40 divisors (see below), whose sum is σ = 251085120. Its totient is φ = 58890240.

The previous prime is 121722361. The next prime is 121722373. The reversal of 121722368 is 863227121.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121722361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12038 + ... + 19706.

It is an arithmetic number, because the mean of its divisors is an integer number (6277128).

Almost surely, 2^121722368 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 121722368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125542560).

121722368 is an abundant number, since it is smaller than the sum of its proper divisors (129362752).

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

121722368 is an frugal number, since it uses more digits than its factorization.

121722368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7718 (or 7702 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 121722368 is about 11032.7860488636. The cubic root of 121722368 is about 495.5910607823.

Adding to 121722368 its reverse (863227121), we get a palindrome (984949489).

The spelling of 121722368 in words is "one hundred twenty-one million, seven hundred twenty-two thousand, three hundred sixty-eight".