121227520 has 36 divisors (see below), whose sum is σ = 290380860. Its totient is φ = 48490496.

The previous prime is 121227517. The next prime is 121227521. The reversal of 121227520 is 25722121.

It can be written as a sum of positive squares in 2 ways, for example, as 58247424 + 62980096 = 7632^2 + 7936^2 .

It is a super-2 number, since 2×121227520² = 29392223210700800, which contains 22 as substring.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 121227491 and 121227500.

It is not an unprimeable number, because it can be changed into a prime (121227521) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 46075 + ... + 48634.

It is an arithmetic number, because the mean of its divisors is an integer number (8066135).

Almost surely, 2^121227520 is an apocalyptic number.

121227520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121227520 is an abundant number, since it is smaller than the sum of its proper divisors (169153340).

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

121227520 is an frugal number, since it uses more digits than its factorization.

121227520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94730 (or 94716 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 121227520 is about 11010.3369612378. The cubic root of 121227520 is about 494.9185595364.

Adding to 121227520 its reverse (25722121), we get a palindrome (146949641).

The spelling of 121227520 in words is "one hundred twenty-one million, two hundred twenty-seven thousand, five hundred twenty".