121330235555 has 32 divisors (see below), whose sum is σ = 152273468160. Its totient is φ = 92729911680.

The previous prime is 121330235503. The next prime is 121330235581. The reversal of 121330235555 is 555532033121.

It is not a de Polignac number, because 121330235555 - 2¹⁸ = 121329973411 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2321744 + ... + 2373426.

It is an arithmetic number, because the mean of its divisors is an integer number (4758545880).

Almost surely, 2^121330235555 is an apocalyptic number.

121330235555 is a deficient number, since it is larger than the sum of its proper divisors (30943232605).

121330235555 is a wasteful number, since it uses less digits than its factorization.

121330235555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51971.

The product of its (nonzero) digits is 67500, while the sum is 35.

Adding to 121330235555 its reverse (555532033121), we get a palindrome (676862268676).

The spelling of 121330235555 in words is "one hundred twenty-one billion, three hundred thirty million, two hundred thirty-five thousand, five hundred fifty-five".