102111210101 has 4 divisors (see below), whose sum is σ = 102160565100. Its totient is φ = 102061855104.

The previous prime is 102111210083. The next prime is 102111210167. The reversal of 102111210101 is 101012111201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70623062500 + 31488147601 = 265750^2 + 177449^2 .

It is a cyclic number.

It is not a de Polignac number, because 102111210101 - 2¹⁰ = 102111209077 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 (102111213101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24674396 + ... + 24678533.

It is an arithmetic number, because the mean of its divisors is an integer number (25540141275).

Almost surely, 2^102111210101 is an apocalyptic number.

It is an amenable number.

102111210101 is a deficient number, since it is larger than the sum of its proper divisors (49354999).

102111210101 is an equidigital number, since it uses as much as digits as its factorization.

102111210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49354998.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 102111210101 its reverse (101012111201), we get a palindrome (203123321302).

The spelling of 102111210101 in words is "one hundred two billion, one hundred eleven million, two hundred ten thousand, one hundred one".