2100120011 has 4 divisors (see below), whose sum is σ = 2291040024. Its totient is φ = 1909200000.

The previous prime is 2100119981. The next prime is 2100120019. The reversal of 2100120011 is 1100210012.

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 2100120011 - 2¹⁴ = 2100103627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100120019) 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, 95459990 + ... + 95460011.

It is an arithmetic number, because the mean of its divisors is an integer number (572760006).

Almost surely, 2^2100120011 is an apocalyptic number.

2100120011 is a deficient number, since it is larger than the sum of its proper divisors (190920013).

2100120011 is a wasteful number, since it uses less digits than its factorization.

2100120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190920012.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2100120011 is about 45827.0663582124. The cubic root of 2100120011 is about 1280.6035587428.

Adding to 2100120011 its reverse (1100210012), we get a palindrome (3200330023).

Subtracting from 2100120011 its reverse (1100210012), we obtain a palindrome (999909999).

The spelling of 2100120011 in words is "two billion, one hundred million, one hundred twenty thousand, eleven".