121322555 has 4 divisors (see below), whose sum is σ = 145587072. Its totient is φ = 97058040.

The previous prime is 121322549. The next prime is 121322587. The reversal of 121322555 is 555223121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555223121 = 157 ⋅3536453.

It is not a de Polignac number, because 121322555 - 2⁶ = 121322491 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 12132251 + ... + 12132260.

It is an arithmetic number, because the mean of its divisors is an integer number (36396768).

Almost surely, 2^121322555 is an apocalyptic number.

121322555 is a deficient number, since it is larger than the sum of its proper divisors (24264517).

121322555 is an equidigital number, since it uses as much as digits as its factorization.

121322555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24264516.

The product of its digits is 3000, while the sum is 26.

The square root of 121322555 is about 11014.6518328997. The cubic root of 121322555 is about 495.0478544355.

Adding to 121322555 its reverse (555223121), we get a palindrome (676545676).

The spelling of 121322555 in words is "one hundred twenty-one million, three hundred twenty-two thousand, five hundred fifty-five".