102011212111 has 4 divisors (see below), whose sum is σ = 102020142952. Its totient is φ = 102002281272.

The previous prime is 102011212081. The next prime is 102011212201. The reversal of 102011212111 is 111212110201.

It is a happy number.

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 102011212111 - 2²⁷ = 101876994383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102011212091 and 102011212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011222111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4448265 + ... + 4471138.

It is an arithmetic number, because the mean of its divisors is an integer number (25505035738).

Almost surely, 2^102011212111 is an apocalyptic number.

102011212111 is a deficient number, since it is larger than the sum of its proper divisors (8930841).

102011212111 is an equidigital number, since it uses as much as digits as its factorization.

102011212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8930840.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 102011212111 its reverse (111212110201), we get a palindrome (213223322312).

The spelling of 102011212111 in words is "one hundred two billion, eleven million, two hundred twelve thousand, one hundred eleven".