121788132155 has 8 divisors (see below), whose sum is σ = 148204149984. Its totient is φ = 96058244800.

The previous prime is 121788132139. The next prime is 121788132161. The reversal of 121788132155 is 551231887121.

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

It is not a de Polignac number, because 121788132155 - 2⁴ = 121788132139 is a prime.

It is a Duffinian 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, 171532226 + ... + 171532935.

It is an arithmetic number, because the mean of its divisors is an integer number (18525518748).

Almost surely, 2^121788132155 is an apocalyptic number.

121788132155 is a deficient number, since it is larger than the sum of its proper divisors (26416017829).

121788132155 is an equidigital number, since it uses as much as digits as its factorization.

121788132155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343065237.

The product of its digits is 134400, while the sum is 44.

The spelling of 121788132155 in words is "one hundred twenty-one billion, seven hundred eighty-eight million, one hundred thirty-two thousand, one hundred fifty-five".