121541355 has 24 divisors (see below), whose sum is σ = 226878288. Its totient is φ = 59835456.

The previous prime is 121541351. The next prime is 121541369. The reversal of 121541355 is 553145121.

It is not a de Polignac number, because 121541355 - 2² = 121541351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121541351) 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 23 ways as a sum of consecutive naturals, for example, 103297 + ... + 104466.

It is an arithmetic number, because the mean of its divisors is an integer number (9453262).

Almost surely, 2^121541355 is an apocalyptic number.

121541355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121541355 is a deficient number, since it is larger than the sum of its proper divisors (105336933).

121541355 is a wasteful number, since it uses less digits than its factorization.

121541355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207787 (or 207784 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 121541355 is about 11024.5795838209. The cubic root of 121541355 is about 495.3452748699.

Adding to 121541355 its reverse (553145121), we get a palindrome (674686476).

The spelling of 121541355 in words is "one hundred twenty-one million, five hundred forty-one thousand, three hundred fifty-five".