121217748 has 12 divisors (see below), whose sum is σ = 282841440. Its totient is φ = 40405912.

The previous prime is 121217711. The next prime is 121217749. The reversal of 121217748 is 847712121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121217749) 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, 5050728 + ... + 5050751.

It is an arithmetic number, because the mean of its divisors is an integer number (23570120).

Almost surely, 2^121217748 is an apocalyptic number.

It is an amenable number.

121217748 is an abundant number, since it is smaller than the sum of its proper divisors (161623692).

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

121217748 is a wasteful number, since it uses less digits than its factorization.

121217748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101486 (or 10101484 counting only the distinct ones).

The product of its digits is 6272, while the sum is 33.

The square root of 121217748 is about 11009.8931874928. The cubic root of 121217748 is about 494.9052609220.

Adding to 121217748 its reverse (847712121), we get a palindrome (968929869).

The spelling of 121217748 in words is "one hundred twenty-one million, two hundred seventeen thousand, seven hundred forty-eight".