102120201111 has 16 divisors (see below), whose sum is σ = 137817336800. Its totient is φ = 67255308288.

The previous prime is 102120201107. The next prime is 102120201119. The reversal of 102120201111 is 111102021201.

It is not a de Polignac number, because 102120201111 - 2² = 102120201107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120201119) 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 15 ways as a sum of consecutive naturals, for example, 353146 + ... + 573543.

It is an arithmetic number, because the mean of its divisors is an integer number (8613583550).

Almost surely, 2^102120201111 is an apocalyptic number.

102120201111 is a deficient number, since it is larger than the sum of its proper divisors (35697135689).

102120201111 is a wasteful number, since it uses less digits than its factorization.

102120201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927138.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102120201111 its reverse (111102021201), we get a palindrome (213222222312).

The spelling of 102120201111 in words is "one hundred two billion, one hundred twenty million, two hundred one thousand, one hundred eleven".