102120211 has 8 divisors (see below), whose sum is σ = 104284944.
Its totient is φ = 99976320.
The previous prime is 102120203. The next prime is 102120301. The reversal of 102120211 is 112021201.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 102120211 - 23 = 102120203 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (102120311) 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 7 ways as a sum of consecutive naturals, for example, 4896 + ... + 15106.
It is an arithmetic number, because the mean of its divisors is an integer number (13035618).
Almost surely, 2102120211 is an apocalyptic number.
102120211 is a deficient number, since it is larger than the sum of its proper divisors (2164733).
102120211 is a wasteful number, since it uses less digits than its factorization.
102120211 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10421.
The product of its (nonzero) digits is 8, while the sum is 10.
The square root of 102120211 is about 10105.4545172397.
The cubic root of 102120211 is about 467.4163515299.
Adding to 102120211 its reverse (112021201), we get a palindrome (214141412).
The spelling of 102120211 in words is "one hundred two million, one hundred twenty thousand, two hundred eleven".