102211021987 has 16 divisors (see below), whose sum is σ = 108020604160. Its totient is φ = 96444771552.

The previous prime is 102211021967. The next prime is 102211021993. The reversal of 102211021987 is 789120112201.

It is a de Polignac number, because none of the positive numbers 2^k-102211021987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102211021907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20844178 + ... + 20849080.

It is an arithmetic number, because the mean of its divisors is an integer number (6751287760).

Almost surely, 2^102211021987 is an apocalyptic number.

102211021987 is a deficient number, since it is larger than the sum of its proper divisors (5809582173).

102211021987 is a wasteful number, since it uses less digits than its factorization.

102211021987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9082.

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

The spelling of 102211021987 in words is "one hundred two billion, two hundred eleven million, twenty-one thousand, nine hundred eighty-seven".