121434553 has 16 divisors (see below), whose sum is σ = 130636800. Its totient is φ = 112480000.

The previous prime is 121434541. The next prime is 121434559. The reversal of 121434553 is 355434121.

It is a cyclic number.

It is not a de Polignac number, because 121434553 - 2²¹ = 119337401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121434559) 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 15 ways as a sum of consecutive naturals, for example, 483678 + ... + 483928.

It is an arithmetic number, because the mean of its divisors is an integer number (8164800).

Almost surely, 2^121434553 is an apocalyptic number.

It is an amenable number.

121434553 is a deficient number, since it is larger than the sum of its proper divisors (9202247).

121434553 is a wasteful number, since it uses less digits than its factorization.

121434553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608.

The product of its digits is 7200, while the sum is 28.

The square root of 121434553 is about 11019.7347064256. The cubic root of 121434553 is about 495.2001408133.

Adding to 121434553 its reverse (355434121), we get a palindrome (476868674).

The spelling of 121434553 in words is "one hundred twenty-one million, four hundred thirty-four thousand, five hundred fifty-three".