11002100221987 has 4 divisors (see below), whose sum is σ = 12573828825136. Its totient is φ = 9430371618840.

The previous prime is 11002100221921. The next prime is 11002100221997. The reversal of 11002100221987 is 78912200120011.

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 11002100221987 - 2⁴³ = 2206007199779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11002100221997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785864301564 + ... + 785864301577.

It is an arithmetic number, because the mean of its divisors is an integer number (3143457206284).

Almost surely, 2^{11002100221987} is an apocalyptic number.

11002100221987 is a deficient number, since it is larger than the sum of its proper divisors (1571728603149).

11002100221987 is an equidigital number, since it uses as much as digits as its factorization.

11002100221987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571728603148.

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

Adding to 11002100221987 its reverse (78912200120011), we get a palindrome (89914300341998).

The spelling of 11002100221987 in words is "eleven trillion, two billion, one hundred million, two hundred twenty-one thousand, nine hundred eighty-seven".