121728893235 has 8 divisors (see below), whose sum is σ = 194766229200. Its totient is φ = 64922076384.

The previous prime is 121728893191. The next prime is 121728893239. The reversal of 121728893235 is 532398827121.

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

It is not a de Polignac number, because 121728893235 - 2¹³ = 121728885043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121728893239) by changing a digit.

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, 4057629760 + ... + 4057629789.

It is an arithmetic number, because the mean of its divisors is an integer number (24345778650).

Almost surely, 2^121728893235 is an apocalyptic number.

121728893235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121728893235 is a deficient number, since it is larger than the sum of its proper divisors (73037335965).

121728893235 is an equidigital number, since it uses as much as digits as its factorization.

121728893235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8115259557.

The product of its digits is 1451520, while the sum is 51.

The spelling of 121728893235 in words is "one hundred twenty-one billion, seven hundred twenty-eight million, eight hundred ninety-three thousand, two hundred thirty-five".