121230555 has 8 divisors (see below), whose sum is σ = 193968912. Its totient is φ = 64656288.

The previous prime is 121230541. The next prime is 121230569. The reversal of 121230555 is 555032121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121230541) and next prime (121230569).

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

It is not a de Polignac number, because 121230555 - 2¹⁰ = 121229531 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4041004 + ... + 4041033.

It is an arithmetic number, because the mean of its divisors is an integer number (24246114).

Almost surely, 2^121230555 is an apocalyptic number.

121230555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121230555 is a deficient number, since it is larger than the sum of its proper divisors (72738357).

121230555 is an equidigital number, since it uses as much as digits as its factorization.

121230555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082045.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 121230555 is about 11010.4747854032. The cubic root of 121230555 is about 494.9226896912.

Adding to 121230555 its reverse (555032121), we get a palindrome (676262676).

The spelling of 121230555 in words is "one hundred twenty-one million, two hundred thirty thousand, five hundred fifty-five".