121240454416 has 15 divisors (see below), whose sum is σ = 234906078981. Its totient is φ = 60619530816.

The previous prime is 121240454411. The next prime is 121240454441. The reversal of 121240454416 is 614454042121.

The square root of 121240454416 is 348196.

It is a perfect power (a square), and thus also a powerful number.

121240454416 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 77843232016 + 43397222400 = 279004^2 + 208320^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121240454411) 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 2 ways as a sum of consecutive naturals, for example, 1349260 + ... + 1436308.

Almost surely, 2^121240454416 is an apocalyptic number.

121240454416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

121240454416 is the 348196-th square number.

It is an amenable number.

121240454416 is a deficient number, since it is larger than the sum of its proper divisors (113665624565).

121240454416 is an frugal number, since it uses more digits than its factorization.

121240454416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174106 (or 87051 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

Adding to 121240454416 its reverse (614454042121), we get a palindrome (735694496537).

The spelling of 121240454416 in words is "one hundred twenty-one billion, two hundred forty million, four hundred fifty-four thousand, four hundred sixteen".