121635342055 has 8 divisors (see below), whose sum is σ = 149356885392. Its totient is φ = 95045290368.

The previous prime is 121635342029. The next prime is 121635342077. The reversal of 121635342055 is 550243536121.

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

It is a cyclic number.

It is not a de Polignac number, because 121635342055 - 2¹⁹ = 121634817767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282872674 + ... + 282873103.

It is an arithmetic number, because the mean of its divisors is an integer number (18669610674).

Almost surely, 2^121635342055 is an apocalyptic number.

121635342055 is a deficient number, since it is larger than the sum of its proper divisors (27721543337).

121635342055 is an equidigital number, since it uses as much as digits as its factorization.

121635342055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565745825.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 121635342055 its reverse (550243536121), we get a palindrome (671878878176).

The spelling of 121635342055 in words is "one hundred twenty-one billion, six hundred thirty-five million, three hundred forty-two thousand, fifty-five".