121044395781987 has 8 divisors (see below), whose sum is σ = 170886205809936. Its totient is φ = 75949424804352.

The previous prime is 121044395781979. The next prime is 121044395782049. The reversal of 121044395781987 is 789187593440121.

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

It is not a de Polignac number, because 121044395781987 - 2³ = 121044395781979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121044395781937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186709762518 + ... + 1186709762619.

It is an arithmetic number, because the mean of its divisors is an integer number (21360775726242).

Almost surely, 2^{121044395781987} is an apocalyptic number.

121044395781987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121044395781987 is a deficient number, since it is larger than the sum of its proper divisors (49841810027949).

121044395781987 is a wasteful number, since it uses less digits than its factorization.

121044395781987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373419525157.

The product of its (nonzero) digits is 121927680, while the sum is 69.

The spelling of 121044395781987 in words is "one hundred twenty-one trillion, forty-four billion, three hundred ninety-five million, seven hundred eighty-one thousand, nine hundred eighty-seven".