100120101121987 has 16 divisors (see below), whose sum is σ = 104533140142080. Its totient is φ = 95712077260800.

The previous prime is 100120101121949. The next prime is 100120101121991. The reversal of 100120101121987 is 789121101021001.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100120101121987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100120101121687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282431662 + ... + 282785932.

It is an arithmetic number, because the mean of its divisors is an integer number (6533321258880).

Almost surely, 2^{100120101121987} is an apocalyptic number.

100120101121987 is a deficient number, since it is larger than the sum of its proper divisors (4413039020093).

100120101121987 is a wasteful number, since it uses less digits than its factorization.

100120101121987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361314.

The product of its (nonzero) digits is 2016, while the sum is 34.

Adding to 100120101121987 its reverse (789121101021001), we get a palindrome (889241202142988).

The spelling of 100120101121987 in words is "one hundred trillion, one hundred twenty billion, one hundred one million, one hundred twenty-one thousand, nine hundred eighty-seven".