121635342019 has 8 divisors (see below), whose sum is σ = 124616746800. Its totient is φ = 118654636800.

The previous prime is 121635341983. The next prime is 121635342029. The reversal of 121635342019 is 910243536121.

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 121635342019 - 2¹¹ = 121635339971 is a prime.

It is a super-2 number, since 2×121635342019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121635342029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186139 + ... + 527179.

It is an arithmetic number, because the mean of its divisors is an integer number (15577093350).

Almost surely, 2^121635342019 is an apocalyptic number.

121635342019 is a deficient number, since it is larger than the sum of its proper divisors (2981404781).

121635342019 is an equidigital number, since it uses as much as digits as its factorization.

121635342019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349781.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 121635342019 in words is "one hundred twenty-one billion, six hundred thirty-five million, three hundred forty-two thousand, nineteen".