121242453554355 has 64 divisors (see below), whose sum is σ = 229350693196800. Its totient is φ = 53512659325440.

The previous prime is 121242453554351. The next prime is 121242453554357. The reversal of 121242453554355 is 553455354242121.

It is not a de Polignac number, because 121242453554355 - 2² = 121242453554351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121242453554298 and 121242453554307.

It is not an unprimeable number, because it can be changed into a prime (121242453554351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 136396245 + ... + 137282265.

It is an arithmetic number, because the mean of its divisors is an integer number (3583604581200).

Almost surely, 2^{121242453554355} is an apocalyptic number.

121242453554355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121242453554355 is a deficient number, since it is larger than the sum of its proper divisors (108108239642445).

121242453554355 is a wasteful number, since it uses less digits than its factorization.

121242453554355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931004.

The product of its digits is 14400000, while the sum is 51.

The spelling of 121242453554355 in words is "one hundred twenty-one trillion, two hundred forty-two billion, four hundred fifty-three million, five hundred fifty-four thousand, three hundred fifty-five".