121244553 has 16 divisors (see below), whose sum is σ = 179819200. Its totient is φ = 80740800.

The previous prime is 121244533. The next prime is 121244581. The reversal of 121244553 is 355442121.

121244553 is a `hidden beast` number, since 1 + 212 + 445 + 5 + 3 = 666.

It is not a de Polignac number, because 121244553 - 2⁵ = 121244521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121244533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30558 + ... + 34296.

It is an arithmetic number, because the mean of its divisors is an integer number (11238700).

Almost surely, 2^121244553 is an apocalyptic number.

It is an amenable number.

121244553 is a deficient number, since it is larger than the sum of its proper divisors (58574647).

121244553 is a wasteful number, since it uses less digits than its factorization.

121244553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949 (or 4943 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 121244553 is about 11011.1104344657. The cubic root of 121244553 is about 494.9417378627.

Adding to 121244553 its reverse (355442121), we get a palindrome (476686674).

The spelling of 121244553 in words is "one hundred twenty-one million, two hundred forty-four thousand, five hundred fifty-three".