121323472 has 40 divisors (see below), whose sum is σ = 244169640. Its totient is φ = 58329600.

The previous prime is 121323409. The next prime is 121323473. The reversal of 121323472 is 274323121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42042256 + 79281216 = 6484^2 + 8904^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121323473) 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, 172722 + ... + 173422.

It is an arithmetic number, because the mean of its divisors is an integer number (6104241).

Almost surely, 2^121323472 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 121323472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122084820).

121323472 is an abundant number, since it is smaller than the sum of its proper divisors (122846168).

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

121323472 is a wasteful number, since it uses less digits than its factorization.

121323472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1105 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 121323472 is about 11014.6934591935. The cubic root of 121323472 is about 495.0491016829.

Adding to 121323472 its reverse (274323121), we get a palindrome (395646593).

The spelling of 121323472 in words is "one hundred twenty-one million, three hundred twenty-three thousand, four hundred seventy-two".