2101120011 has 6 divisors (see below), whose sum is σ = 3034951140. Its totient is φ = 1400746668.

The previous prime is 2101120009. The next prime is 2101120027. The reversal of 2101120011 is 1100211012.

It is a happy number.

It is not a de Polignac number, because 2101120011 - 2¹ = 2101120009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 233457779 = 2101120011 / (2 + 1 + 0 + 1 + 1 + 2 + 0 + 0 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 2101119975 and 2101120002.

It is not an unprimeable number, because it can be changed into a prime (2101120001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116728881 + ... + 116728898.

It is an arithmetic number, because the mean of its divisors is an integer number (505825190).

Almost surely, 2^2101120011 is an apocalyptic number.

2101120011 is a deficient number, since it is larger than the sum of its proper divisors (933831129).

2101120011 is a wasteful number, since it uses less digits than its factorization.

2101120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233457785 (or 233457782 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2101120011 is about 45837.9756424736. The cubic root of 2101120011 is about 1280.8067852802.

Adding to 2101120011 its reverse (1100211012), we get a palindrome (3201331023).

The spelling of 2101120011 in words is "two billion, one hundred one million, one hundred twenty thousand, eleven".