121144355 has 4 divisors (see below), whose sum is σ = 145373232. Its totient is φ = 96915480.

The previous prime is 121144343. The next prime is 121144417. The reversal of 121144355 is 553441121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553441121 = 47 ⋅11775343.

It is not a de Polignac number, because 121144355 - 2⁶ = 121144291 is a prime.

It is a super-3 number, since 3×121144355³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12114431 + ... + 12114440.

It is an arithmetic number, because the mean of its divisors is an integer number (36343308).

Almost surely, 2^121144355 is an apocalyptic number.

121144355 is a deficient number, since it is larger than the sum of its proper divisors (24228877).

121144355 is an equidigital number, since it uses as much as digits as its factorization.

121144355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24228876.

The product of its digits is 2400, while the sum is 26.

The square root of 121144355 is about 11006.5596350540. The cubic root of 121144355 is about 494.8053582935.

Adding to 121144355 its reverse (553441121), we get a palindrome (674585476).

The spelling of 121144355 in words is "one hundred twenty-one million, one hundred forty-four thousand, three hundred fifty-five".