10001122120987 has 4 divisors (see below), whose sum is σ = 10527496969480. Its totient is φ = 9474747272496.

The previous prime is 10001122120933. The next prime is 10001122120991. The reversal of 10001122120987 is 78902122110001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10001122120987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10001122190987) 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 3 ways as a sum of consecutive naturals, for example, 263187424218 + ... + 263187424255.

It is an arithmetic number, because the mean of its divisors is an integer number (2631874242370).

Almost surely, 2^{10001122120987} is an apocalyptic number.

10001122120987 is a deficient number, since it is larger than the sum of its proper divisors (526374848493).

10001122120987 is an equidigital number, since it uses as much as digits as its factorization.

10001122120987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526374848492.

The product of its (nonzero) digits is 4032, while the sum is 34.

Adding to 10001122120987 its reverse (78902122110001), we get a palindrome (88903244230988).

The spelling of 10001122120987 in words is "ten trillion, one billion, one hundred twenty-two million, one hundred twenty thousand, nine hundred eighty-seven".