121178345678830 has 96 divisors (see below), whose sum is σ = 243777596235264. Its totient is φ = 43325694720000.

The previous prime is 121178345678821. The next prime is 121178345678851. The reversal of 121178345678830 is 38876543871121.

It is a happy number.

It is a super-2 number, since 2×121178345678830² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 191072755 + ... + 191705905.

It is an arithmetic number, because the mean of its divisors is an integer number (2539349960784).

Almost surely, 2^{121178345678830} is an apocalyptic number.

121178345678830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121178345678830 is an abundant number, since it is smaller than the sum of its proper divisors (122599250556434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121178345678830 is a wasteful number, since it uses less digits than its factorization.

121178345678830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635834 (or 635823 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 64.

The spelling of 121178345678830 in words is "one hundred twenty-one trillion, one hundred seventy-eight billion, three hundred forty-five million, six hundred seventy-eight thousand, eight hundred thirty".