2101111207 has 4 divisors (see below), whose sum is σ = 2262735160. Its totient is φ = 1939487256.

The previous prime is 2101111189. The next prime is 2101111213. The reversal of 2101111207 is 7021111012.

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 2101111207 - 2⁷ = 2101111079 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 (2101111217) 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, 80811957 + ... + 80811982.

It is an arithmetic number, because the mean of its divisors is an integer number (565683790).

Almost surely, 2^2101111207 is an apocalyptic number.

2101111207 is a deficient number, since it is larger than the sum of its proper divisors (161623953).

2101111207 is a wasteful number, since it uses less digits than its factorization.

2101111207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161623952.

The product of its (nonzero) digits is 28, while the sum is 16.

The square root of 2101111207 is about 45837.8796084636. The cubic root of 2101111207 is about 1280.8049963552.

Adding to 2101111207 its reverse (7021111012), we get a palindrome (9122222219).

The spelling of 2101111207 in words is "two billion, one hundred one million, one hundred eleven thousand, two hundred seven".