2102211100987 has 4 divisors (see below), whose sum is σ = 2106811125736. Its totient is φ = 2097611076240.

The previous prime is 2102211100949. The next prime is 2102211101033. The reversal of 2102211100987 is 7890011122012.

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

It is a cyclic number.

It is not a de Polignac number, because 2102211100987 - 2³⁹ = 1552455287099 is a prime.

It is a super-2 number, since 2×2102211100987² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102211100907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2300011689 + ... + 2300012602.

It is an arithmetic number, because the mean of its divisors is an integer number (526702781434).

Almost surely, 2^{2102211100987} is an apocalyptic number.

2102211100987 is a deficient number, since it is larger than the sum of its proper divisors (4600024749).

2102211100987 is an equidigital number, since it uses as much as digits as its factorization.

2102211100987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600024748.

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

Adding to 2102211100987 its reverse (7890011122012), we get a palindrome (9992222222999).

The spelling of 2102211100987 in words is "two trillion, one hundred two billion, two hundred eleven million, one hundred thousand, nine hundred eighty-seven".