121144555 has 8 divisors (see below), whose sum is σ = 166141152. Its totient is φ = 83070528.

The previous prime is 121144553. The next prime is 121144603. The reversal of 121144555 is 555441121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121144555 - 2¹ = 121144553 is a prime.

It is a super-3 number, since 3×121144555³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121144553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1730602 + ... + 1730671.

It is an arithmetic number, because the mean of its divisors is an integer number (20767644).

Almost surely, 2^121144555 is an apocalyptic number.

121144555 is a deficient number, since it is larger than the sum of its proper divisors (44996597).

121144555 is an equidigital number, since it uses as much as digits as its factorization.

121144555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461285.

The product of its digits is 4000, while the sum is 28.

The square root of 121144555 is about 11006.5687205414. The cubic root of 121144555 is about 494.8056305885.

Adding to 121144555 its reverse (555441121), we get a palindrome (676585676).

The spelling of 121144555 in words is "one hundred twenty-one million, one hundred forty-four thousand, five hundred fifty-five".