121210120111987 has 8 divisors (see below), whose sum is σ = 128340922262832. Its totient is φ = 114079406304000.

The previous prime is 121210120111981. The next prime is 121210120112009. The reversal of 121210120111987 is 789111021012121.

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

It is not a de Polignac number, because 121210120111987 - 2³ = 121210120111979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121210120111981) 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, 19250514 + ... + 24758887.

It is an arithmetic number, because the mean of its divisors is an integer number (16042615282854).

Almost surely, 2^{121210120111987} is an apocalyptic number.

121210120111987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121210120111987 is a deficient number, since it is larger than the sum of its proper divisors (7130802150845).

121210120111987 is a wasteful number, since it uses less digits than its factorization.

121210120111987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44171429.

The product of its (nonzero) digits is 4032, while the sum is 37.

The spelling of 121210120111987 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, one hundred eleven thousand, nine hundred eighty-seven".