121794278855 has 8 divisors (see below), whose sum is σ = 150867752064. Its totient is φ = 94292344800.

The previous prime is 121794278843. The next prime is 121794278863. The reversal of 121794278855 is 558872497121.

It is a happy number.

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

It is not a de Polignac number, because 121794278855 - 2⁴ = 121794278839 is a prime.

It is a super-2 number, since 2×121794278855² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121794278794 and 121794278803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392884616 + ... + 392884925.

It is an arithmetic number, because the mean of its divisors is an integer number (18858469008).

Almost surely, 2^121794278855 is an apocalyptic number.

121794278855 is a deficient number, since it is larger than the sum of its proper divisors (29073473209).

121794278855 is an equidigital number, since it uses as much as digits as its factorization.

121794278855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785769577.

The product of its digits is 11289600, while the sum is 59.

The spelling of 121794278855 in words is "one hundred twenty-one billion, seven hundred ninety-four million, two hundred seventy-eight thousand, eight hundred fifty-five".